First Oral Therapy for Rare Adrenal Gland Tumors Gets Green Light From FDA

Posted on May 17, 2025 by MaryO
FDA approval for Welireg.

The FDA has expanded the approval of belzutifanopens in a new tab or window (Welireg) to include certain types of pheochromocytoma or paraganglioma (PPGL) in adults and children.

The action establishes belzutifan as the only approved oral therapy for PPGL. The approval stipulates use in adults and children 12 years or older with locally advanced, unresectable, or metastatic PPGL.

Support for the approval came from the LITESPARK-015opens in a new tab or window multi-cohort trial. Cohort A1 involved 72 patients with locally advanced or metastatic PPGL not amenable to surgery or curative treatment. Patients with concomitant hypertension adequately managed with blood pressure medication were required to have stable therapy for at least 2 weeks prior to enrollment.

The primary outcome was objective response rate (ORR). Secondary outcomes included duration of response (DOR) and number of patients with at least a 50% dose reduction for one or more antihypertensive medications for at least 6 months.

The results showed an ORR of 26% and a median DOR of 20.4 months. Additionally, 19 of 60 patients on baseline antihypertensive medications met the prespecified dose-reduction target.

Adverse reactions occurring in ≥25% of patients included anemia; fatigue; musculoskeletal pain; increased liver enzymes, calcium, potassium, and alkaline phosphatase; decreased lymphocytes and leukocytes; dyspnea; headache; dizziness; and nausea.

PPGLs comprise a group of rare neuroendocrine tumorsopens in a new tab or window that have an incidence of approximately 0.57 per 100,000 person-years. The tumors occur in 0.1% t0 0.6% of patients with hypertension and account for about 5% of adrenal incidentalomas.

A hypoxia-inducible factor-2α inhibitor, belzutifan previously received approval for advanced renal cell carcinomaopens in a new tab or window and certain subtypes of von Hippel-Lindau diseaseopens in a new tab or window.

Charles Bankhead is senior editor for oncology and also covers urology, dermatology, and ophthalmology. He joined MedPage Today in 2007. Follow 

From https://www.medpagetoday.com/hematologyoncology/othercancers/115582

Filed under: adrenal, Clinical trials, Treatments | Tagged: , , , , , | Leave a comment »

Ectopic ACTH-secreting Pheochromocytoma Without Typical Signs of Cushing Syndrome

Posted on May 3, 2025 by MaryO

Abstract

This case report describes a 42-year-old female with a rare pheochromocytoma presenting without classic Cushingoid features but with uncontrolled hypertension, type 2 diabetes, and recurrent headaches. Despite the absence of typical signs, biochemical analysis revealed elevated cortisol and ACTH levels, and imaging showed a 6 cm adrenal mass. The patient was stabilized preoperatively with alpha-blockers and metyrapone before undergoing a successful laparoscopic adrenalectomy. Histopathology confirmed pheochromocytoma with aggressive features. Postoperatively, her blood pressure and symptoms improved, and her cortisol levels normalized. This case underscores the diagnostic challenges of ACTH-secreting pheochromocytomas without classic hypercortisolism signs and emphasizes the need for thorough endocrine and imaging assessments. Surgical resection remains the definitive treatment, with long-term follow-up essential to monitor for recurrence. This case contributes to the limited literature on the coexistence of pheochromocytoma and ectopic ACTH secretion.

Introduction

Ectopic ACTH-dependent tumors are rare, comprising approximately 5%–10% of Cushing syndrome cases, and are infrequently associated with pheochromocytomas, making this a unique presentation [1, 2]. Pheochromocytomas, though rare, can present as adrenal incidentalomas, often discovered during imaging for unrelated conditions. They represent 7% of adrenal incidentalomas and pose clinical challenges due to the risk of hormonal hypersecretion, including excess catecholamines and cortisol [1]. This case highlights the coexistence of an ectopic ACTH-producing tumor and pheochromocytoma, a combination rarely reported in the literature [3, 4]. While Cushing syndrome typically arises from adrenal or pituitary sources, ectopic ACTH secretion from pheochromocytomas presents a diagnostic and therapeutic challenge due to its rarity and aggressive potential [4–6]. Early diagnosis is crucial, particularly in cases with comorbidities like hypertension and diabetes, which are common in pheochromocytomas [1, 2]. This case underscores the need for a multidisciplinary approach to managing rare endocrine tumors.

Case report

A 42-year-old female from Mexico City presented with a history of treatment-resistant hypertension and a newly identified adrenal mass. She had no history of alcohol or tobacco use and led a generally healthy lifestyle. She was diagnosed with type 2 diabetes five years before symptoms appeared and developed hypertension five years before hospitalization, managed with valsartan and amlodipine verapamil.

The patient’s hypertension worsened, with blood pressure readings reaching 200/160 mmHg. She presented with asthenia and adynamia, and a CT scan revealed a 4 cm right adrenal mass, confirmed as 4.7 cm on a subsequent scan (Fig. 1). No signs of metastasis were observed. Upon hospital admission, her physical examination revealed a blood pressure of 95/84 mmHg, a heart rate of 95 beats per minute, a respiratory rate of 28 breaths per minute, and a systolic murmur. She exhibited no Cushingoid features.

 

The imaging identified a hyperdense area at the lower pole of the left kidney. A heterogeneous image was visualized in the right adrenal gland, characterized by a hypodense lesion measuring 40 × 47 × 43 mm, with a density of 36 Hounsfield units (HU) in the simple phase, 107 HU in the venous phase and 61 HU in the delayed phase (15 min), with an absolute washout of 64%.

Figure 1

The imaging identified a hyperdense area at the lower pole of the left kidney. A heterogeneous image was visualized in the right adrenal gland, characterized by a hypodense lesion measuring 40 × 47 × 43 mm, with a density of 36 Hounsfield units (HU) in the simple phase, 107 HU in the venous phase and 61 HU in the delayed phase (15 min), with an absolute washout of 64%.

Initial laboratory tests showed elevated white blood cells (11 000/mm3), hemoglobin of 12.5 g/dl, and platelet count of 305 000/mm3. Blood chemistry indicated hyperglycemia (132 mg/dl), hyponatremia (129 mEq/l), and hypokalemia (3.4 mEq/l). Cortisol levels were elevated at 31.53 μg/dl, and a 1 mg low-dose dexamethasone suppression test showed cortisol levels of 16.65 μg/dl and 14.63 μg/dl, suggesting ACTH-dependent Cushing syndrome.

ACTH levels were 24 pg/ml, which, while elevated, were not suppressed. However, elevated 24-h urinary metanephrines (9881 μg/24 h) confirmed the presence of pheochromocytoma. The patient’s aldosterone-to-renin ratio was measured, revealing a ratio of 4. The serum aldosterone level was 5 ng/dl (138 pmol/l), while plasma renin activity was recorded at 1.1 ng/ml/h.

Imaging revealed a 4.7 cm right adrenal mass with a density of 36 Hounsfield Units and an absolute washout of 64%, with no signs of malignancy (Fig. 1).

The patient’s hypertension was initially managed with prazosin and metoprolol, but her blood pressure spiked to 200/160 mmHg during a hypertensive crisis, requiring nitroprusside. Surgical intervention was planned after diagnosis was confirmed.

The patient underwent a successful laparoscopic right adrenalectomy. The tumor measured 6 cm, and histopathology confirmed a pheochromocytoma with a PASS score of 4, indicating potential for aggressive behavior (Table 1). Histological and immunohistochemical analysis revealed the tumor’s characteristic organoid pattern (Zellballen) with chromogranin and synaptophysin positivity in principal cells and S100 protein staining in sustentacular cells, consistent with pheochromocytoma (Fig. 2). Postoperatively, her blood pressure stabilized, and symptoms of palpitations and sweating resolved. She has weaned off antihypertensives, and a follow-up dexamethasone suppression test showed a significant reduction in cortisol levels (1.2 μg/dl), indicating successful tumor removal.

 

Table 1

Histopathological report.

HISTOPATHOLOGICAL DIAGNOSIS
Specimen from right adrenalectomy:
Pheochromocytoma measuring 6×6 cm (positive for chromogranin 7, synaptophysin +S100, with sustentacular cells staining positive)

  • Marked nuclear pleomorphism: 1 point
  • Diffuse growth pattern: 2 points
  • Capsular invasion: 1 point
Total: 4 points.
Tumors with a score greater than 4 may exhibit aggressive biological behavior.

 

Histological and microscopic findings of adrenal Pheochromocytoma. (A) Macroscopic appearance. The ovoid tissue specimen has a light, smooth, soft external surface. The cut surface reveals a dark inner surface with light and hemorrhagic areas. Two cystic lesions with smooth walls are observed in the center (gross view). (B) A well-demarcated hypercellular lesion with an organoid pattern (Zellballen), separated by thin fibrovascular septa (Hematoxylin and eosin stain, 40×). (C) Nest of polygonal principal cells with ample eosinophilic granular cytoplasm, well-defined plasma membranes, hyperchromatic nuclei, and mild nuclear pleomorphism. Adjacent to the principal cells are spindle-shaped sustentacular cells with eosinophilic cytoplasm (Hematoxylin and eosin stain, 400×). (D) Positive immunoreactivity for chromogranin in principal cells. (E) Intense cytoplasmic reaction for synaptophysin in principal cells (immunohistochemistry, 400×). (F) Positive immunoreactivity for S100 protein, showing nuclear and cytoplasmic staining in sustentacular cells (immunohistochemistry, 400×).

Figure 2

Histological and microscopic findings of adrenal Pheochromocytoma. (A) Macroscopic appearance. The ovoid tissue specimen has a light, smooth, soft external surface. The cut surface reveals a dark inner surface with light and hemorrhagic areas. Two cystic lesions with smooth walls are observed in the center (gross view). (B) A well-demarcated hypercellular lesion with an organoid pattern (Zellballen), separated by thin fibrovascular septa (Hematoxylin and eosin stain, 40×). (C) Nest of polygonal principal cells with ample eosinophilic granular cytoplasm, well-defined plasma membranes, hyperchromatic nuclei, and mild nuclear pleomorphism. Adjacent to the principal cells are spindle-shaped sustentacular cells with eosinophilic cytoplasm (Hematoxylin and eosin stain, 400×). (D) Positive immunoreactivity for chromogranin in principal cells. (E) Intense cytoplasmic reaction for synaptophysin in principal cells (immunohistochemistry, 400×). (F) Positive immunoreactivity for S100 protein, showing nuclear and cytoplasmic staining in sustentacular cells (immunohistochemistry, 400×).

Postoperatively, her course was uneventful, with stable blood pressure without antihypertensives. A follow-up evaluation revealed normal cortisol levels, and 24-h urinary metanephrines returned to normal (312 μg/24 h for metanephrines; 225 μg/24 h for normetanephrines). Repeat imaging showed no residual adrenal mass. At her most recent follow-up, the patient remained asymptomatic with normal laboratory values, and no recurrence has been detected.

Discussion

Ectopic ACTH-secreting pheochromocytomas are rare, accounting for a small percentage of ACTH-dependent Cushing syndrome cases [1, 4–6]. These tumors present diagnostic challenges, mainly when typical signs of Cushing syndrome, such as moon face, abdominal striae, or muscle weakness, are absent [3]. In this case, the patient exhibited only diabetes, uncontrolled hypertension, and recurrent headaches, symptoms that can also be attributed to pheochromocytoma itself [1]. The absence of Cushingoid features delayed the identification of ectopic ACTH secretion, making this case particularly difficult and unusual.

According to Gabi JN et al., most patients with ACTH-secreting pheochromocytomas present with severe hypercortisolism, including rapid weight gain and characteristic facial changes [3]. The absence of such features in this patient highlights the need to consider ectopic ACTH secretion in cases of adrenal masses, even without typical Cushing syndrome symptoms. This case illustrates how subtle presentations can lead to delayed diagnoses, emphasizing the importance of thorough evaluation in patients with adrenal tumors and metabolic abnormalities [1, 3].

The diagnostic approach for pheochromocytomas includes hormonal assays and imaging [7, 8]. Preoperative management for pheochromocytomas typically includes alpha-blockers to manage catecholamine excess [4, 7, 8]. This patient was managed with prazosin for blood pressure control and metyrapone to suppress cortisol production, consistent with clinical guidelines for managing ACTH-secreting tumors [5, 7, 8]. Despite the absence of Cushingoid features, careful preoperative preparation was essential to prevent complications during surgery.

Surgical resection is the definitive treatment for pheochromocytomas, particularly those secreting ACTH [8]. In this case, the patient underwent a successful laparoscopic adrenalectomy with no intraoperative complications. Histopathology confirmed a pheochromocytoma with marked nuclear pleomorphism and capsular invasion, suggesting potential aggressive behavior. Postoperatively, the patient’s blood pressure normalized, and her diabetes improved, aligning with outcomes reported in similar cases [4, 6]. Cortisol levels also returned to normal, demonstrating the effectiveness of adrenalectomy in resolving hypercortisolism.

A limitation in this case was the delayed recognition of ectopic ACTH secretion due to the absence of typical Cushingoid signs. The literature underscores the importance of considering this diagnosis, even in nonspecific cases [5].

Long-term management of pheochromocytomas, particularly those with aggressive features like capsular invasion, requires close follow-up [5, 7, 8]. Genetic testing should be considered, especially in patients with unusual presentations or family histories of endocrine disorders [1, 5]. Although not performed in this case, genetic testing could have provided further insight into the tumor’s etiology.

Acknowledgements

We thank the radiology department for interpreting the CT.

Conflict of interest

The authors declare no conflicts of interest related to this case report.

Funding

No external funding was received for this study.

Ethical approval

No approval was required.

Consent

Written informed consent was obtained from the patient and her parents to publish this case report and any accompanying images.

Guarantor

Froylan D. Martinez-Sanchez is the guarantor for this publication and accepts full responsibility for the work.

© The Author(s) 2025. Published by Oxford University Press.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

Filed under: adrenal, Cushing's, Rare Diseases | Tagged: , , , , , , | Leave a comment »

Clinical Features and Treatment Options for Pediatric Adrenal Incidentalomas

Posted on March 25, 2024 by MaryO

Abstract

Background

The aim of this study was to investigate the clinical features and treatment options for pediatric adrenal incidentalomas(AIs) to guide the diagnosis and treatment of these tumors.

Methods

The clinical data of AI patients admitted to our hospital between December 2016 and December 2022 were collected and retrospectively analyzed. All patients were divided into neonatal and nonneonatal groups according to their age at the time of the initial consultation.

Results

In the neonatal group, 13 patients were observed and followed up, and the masses completely disappeared in 8 patients and were significantly reduced in size in 5 patients compared with the previous findings. Four patients ultimately underwent surgery, and the postoperative pathological diagnosis was neuroblastoma in three patients and teratoma in one patient. In the nonneonatal group, there were 18 cases of benign tumors, including 9 cases of ganglioneuroma, 2 cases of adrenocortical adenoma, 2 cases of adrenal cyst, 2 cases of teratoma, 1 case of pheochromocytoma, 1 case of nerve sheath tumor, and 1 case of adrenal hemorrhage; and 20 cases of malignant tumors, including 10 cases of neuroblastoma, 9 cases of ganglioneuroblastoma, and 1 case of adrenocortical carcinoma.

Conclusions

Neuroblastoma is the most common type of nonneonatal AI, and detailed laboratory investigations and imaging studies are recommended for aggressive evaluation and treatment in this population. The rate of spontaneous regression of AI is high in neonates, and close observation is feasible if the tumor is small, confined to the adrenal gland and has no distant metastasis.

Peer Review reports

Background

The incidence of adrenal incidentaloma (AI) is increasing due to the increased frequency of imaging and improved imaging sensitivity [1]. AI is relatively common in adults, and several organizations, such as the American Association of Clinical Endocrinologists/American Association of Endocrine Surgeons and the European Society Endocrinology, have proposed specific protocols to guide the evaluation, treatment, and follow-up management of AI in adults [2]. Although AI, a nonfunctioning adrenocortical adenoma, is most common in adults, neuroblastoma is the most common incidental tumor of the adrenal gland in children. In addition, in the neonatal period, which is a more complex stage of childhood, the biology of adrenal masses found in this age group is also more specific, and the nature of these masses can range from spontaneous regression to rapid progression to aggressive disease with metastatic dissemination and even death. Given that AI is the most common malignant tumor, the management of AI in children cannot be simply based on the measurements used in adult AI. In this study, we retrospectively analyzed the clinical data of pediatric AI patients in a single center to investigate the clinical characteristics and management of AI in children.

Methods

A total of 66 children with adrenal tumors were diagnosed and treated at the Department of Urology of the Children’s Hospital of Nanjing Medical University from December 2016 to December 2022. A total of 55 cases were detected during physical examination, or the patients were diagnosed and received treatment for diseases other than adrenal disease after excluding adrenal tumors detected due to typical clinical manifestations or signs such as centripetal obesity and precocious puberty. Research protocols involving human materials were approved by the Medical Ethics Committee of the Children’s Hospital of Nanjing Medical University. All clinical information, radiological diagnosis, laboratory test results, intervention results, and follow-up data were collected from the department’s database.

All the children underwent ultrasonography and CT scanning, and 11 children underwent MRI. In addition to routine tests such as blood routine and biochemical indexes, the examination and evaluation of adrenal endocrine hormones and tumor markers included (1) plasma cortisol and ACTH levels, (2) plasma catecholamine and metabolite determination, (3) plasma renin and plasma aldosterone, (4) urinary vanillylmandelic acid/homovanillic acid(VMA/HVA), and (5) AFP, CEA, NSE, and CA19-9. Five patients underwent a low-dose dexamethasone suppression test. Seventeen of the 55 patients were treated with watch-waiting therapy, 4 of the 17 ultimately underwent surgery, 4 of the 38 patients underwent tumor biopsy, and 34 underwent adrenalectomy.

The data were analyzed using Graph Pad Prism 8. The measurement data are expressed as ‾x ± sd. The maximum diameter of the tumors, age of the patients with benign and malignant tumors, and maximum diameter of the tumors between the laparoscopic surgery group and the open surgery group were compared using paired t tests, and the percentages of the count data were compared using Fisher’s exact test.

Results

In this study, all patients were divided into two groups according to their age at the time of consultation: the neonate group and the nonneonate group.

Neonate group:

There were 7 male and 10 female patients, 7 of whom were diagnosed via prenatal examination and 10 of whom were diagnosed after birth. Five patients were diagnosed with lesions on the left side, 12 patients were diagnosed with lesions on the right side, and the maximal diameters of the masses ranged from 16 to 48 mm. The characteristics of the AIs in the neonate group are presented in Table 1.

Table 1 Characteristics of AI in the neonates group

Among the 17 patients, 8 had cystic masses with a maximum diameter of 16∼48 mm, 5 had cystic-solid masses with a maximum diameter of 33∼39 mm, and 4 had solid masses with a maximum diameter of 18∼45 mm. Two patients with solid adrenal gland masses suggested by CT scan had obvious elevations in serum NSE and maximum diameters of 44 and 45 mm, respectively. These patients underwent adrenal tumor resection, and the pathology diagnosed that they had neuroblastomas(NB). In one patient, the right adrenal gland was 26 × 24 × 27 mm in size with slightly elevated echogenicity at 38 weeks after delivery, and the mass increased to a size of 40 × 39 × 29 mm according to the 1-month postnatal review. MRI suggested that the adrenal gland tumor was associated with liver metastasis, and the pathology of the tumor suggested that it was NB associated with liver metastasis after surgical resection (stage 4 S, FH). One child was found to have 25 × 24 × 14 mm cystic echoes in the left adrenal region during an obstetric examination, and ultrasound revealed 18 × 11 mm cystic solid echoes 5 days after birth. Ultrasound revealed 24 × 15 mm cystic solid echoes at 2 months. Serum NSE and urinary VMA were normal, and the tumor was excised due to the request of the parents. Pathology suggested a teratoma in the postoperative period. A total of 13 children did not receive surgical treatment or regular review via ultrasound, serum NSE or urine VMA. The follow-up time ranged from 1 to 31 months, with a mean of 9.04 ± 7.61 months. Eight patients had complete swelling, and 5 patients were significantly younger than the previous patients. Nonneonate group:

There were 24 male and 14 female patients in the nonneonate group; 24 patients had lesions on the left side, 14 patients had lesions on the right side, and the maximal diameters of the masses ranged from 17 to 131 mm. Most of these tumors were found during routine physical examinations or incidentally during examinations performed for various complaints, such as gastrointestinal symptoms, respiratory symptoms, or other related conditions. As shown in Table 2, abdominal pain was the most common risk factor (44.7%) for clinical onset, followed by routine physical examination and examination for respiratory symptoms.

Table 2 Clinical presentations leading to discovery of AI in non-neonate group

Among the 38 patients, 10 had NBs with maximum diameters ranging from 20 to 131 mm, 9 had ganglion cell neuroblastomas with maximum diameters ranging from 33.6 to 92 mm, 9 had ganglion cell neuromas with maximum diameters ranging from 33 to 62 mm, 2 had adrenal adenomas with maximum diameters ranging from 17 to 70 mm, 1 had a cortical carcinoma with a maximum diameter of 72 mm, 2 had adrenal cysts with maximum diameters ranging from 26 to 29 mm, 2 had mature teratomas with maximum diameters of 34 and 40 mm, 1 had a pheochromocytoma with a diameter of 29 mm, 1 had a nerve sheath tumor with a diameter of 29 mm, and 1 patient with postoperative pathological confirmation of partial hemorrhagic necrosis of the adrenal gland had focal calcification with a maximum diameter of 25 mm (Table 3).

Table 3 Distribution of different pathologies among AI with various sizes in non-neonate group

The mean age of children with malignant tumors was significantly lower than that of children with benign tumors (57.95 ± 37.20 months vs. 105.0 ± 23.85 months; t = 4.582, P < 0.0001). The maximum diameter of malignant tumors ranged from 20 to 131 mm, while that of benign tumors ranged from 17 to 72 mm, and the maximum diameter of malignant tumors was significantly greater than that of benign tumors (65.15 ± 27.61 mm v 37.59 ± 12.98 mm; t = 3.863, P = 0.0004). Four biopsies, 5 laparoscopic adrenal tumor resections and 11 open adrenal tumor resections were performed for malignant tumors, and 16 laparoscopic adrenal tumor resections and 2 open procedures were performed for benign tumors. The maximum diameter of the tumors ranged from 17 to 62 mm in 21 children who underwent laparoscopic surgery and from 34 to 99 mm in 13 children who underwent open resection; there was a statistically significant difference in the maximum diameter of the tumors between the laparoscopic surgery group and the open surgery group (35.63 ± 10.36 mm v 66.42 ± 20.60 mm; t = 5.798, P < 0.0001).

Of the 42 children with definitive pathologic diagnoses at surgery, 23 had malignant tumors, and 19 had benign tumors. There were 15 malignant tumors with calcification on imaging and 5 benign tumors. The percentage of malignant tumors with calcifications in was significantly greater than that of benign tumors (65.22% v 26.32%; P = 0.0157). In the present study, all the children underwent CT, and 31 patients had postoperative pathological confirmation of NB. A total of 26 patients were considered to have neurogenic tumors according to preoperative CT, for a diagnostic compliance rate of 83.97%. Three children were considered to have cortical adenomas by preoperative CT, and 1 was ultimately diagnosed by postoperative pathology, for a diagnostic compliance rate of 33.33%. For 4 patients with teratomas and adrenal cysts, the CT findings were consistent with the postoperative pathology. According to our research, NB 9-110HU, GNB 15-39HU, GB 19-38HU, ACA 8HU, adrenal cyst 8HU, and cellular achwannoma 17HU.

Discussion

According to the clinical practice guidelines developed by the European Society of Endocrinology and European Network for the Study of Adrenal Tumors, AI is an adrenal mass incidentally detected on imaging not performed for a suspected adrenal disease [3]. The prevalence of AI is approximately 4%, and the incidence increases with age [4]. Most adult AIs are nonfunctioning benign adrenal adenomas (up to 75%), while others include functioning adrenal adenomas, pheochromocytomas, and adrenocortical carcinomas [5]. In contrast to the disease spectrum of adult AI cases, NB is the most common tumor type among children with AI, and benign cortical adenomas, which account for the vast majority of adult AI, accounting for less than 0.5% of cases in children [6]. According to several guidelines, urgent assessment of an AI is recommended in children because of a greater likelihood of malignancy [3, 7].

When an adult patient is initially diagnosed with AI, it should be clear whether the lesion is malignant and functional. In several studies, the use of noncontrast CT has been recommended as the initial imaging method for adrenal incidentaloma; a CT attenuation value ≤ 10 HU is used as the diagnostic criterion for benign adenomas; and these methods have a specificity of 71-79% and a sensitivity of 96-98% [8, 9]. A CT scan of tumors with diameters greater than 4 to 6 cm, irregular margins or heterogeneity, a CT attenuation value greater than 10 HU, or a relative contrast enhancement washout of less than 40% 10 or 15 min after administration of contrast media on enhanced CT is considered to indicate potential malignancy [7]. As the most common AI in children, NB often appears as a soft tissue mass with uneven density on CT, often accompanied by high-density calcified shadows, low-density cystic lesions or necrotic areas. CT scans can easily identify more typical NBs, and for those AIs that do not show typical calcified shadows on CT, it is sometimes difficult to differentiate neurogenic tumors from adenomas. In these patients, except for the 1 patient with adrenal cysts who had a CT value of 8 HU, very few of the remaining AI patients had a CT value less than 10 HU. Therefore, the CT value cannot be used simply as a criterion for determining the benign or malignant nature of AI, and additional imaging examinations, such as CT enhancement, MRI, and FDG-PET if necessary, should be performed immediately for AI in children.

Initial hormonal testing is also needed for functional assessment, and aldosterone secretion should also be assessed when the patient is hypertensive or hypokalemic [7]. Patients with AI who are not suitable for surgery should be observed during the follow-up period, and if abnormal adrenal secretion is detected or suggestive of malignancy during this period, prompt adrenal tumor resection is needed. For adult patients with AI, laparoscopic adrenal tumor resection is one of the most effective treatments that has comparative advantages in terms of hospitalization time and postoperative recovery speed; however, there is still some controversy over whether to perform laparoscopic surgery for some malignant tumors with large diameters, especially adrenocortical carcinomas, and some studies have shown that patients who undergo laparoscopic surgery are more prone to peritoneal seeding of tumors [10].

The maximum diameter of an adult AI is a predictor of malignancy, and a study by the National Italian Study Group on Adrenal Tumors, which included 887 AIs, showed that adrenocortical carcinoma was significantly correlated with the size of the mass, and the sensitivity of detecting adrenocortical carcinoma with a threshold of 4 cm was 93% [11]. According to the National Institutes of Health, patients with tumors larger than 6 cm should undergo surgical treatment, while patients with tumors smaller than 4 cm should closely monitored; for patients with tumors between 4 and 6 cm, the choice of whether to be monitored or surgically treated can be based on other indicators, such as imaging [12]. A diameter of 4 cm is not the initial threshold for determining the benign or malignant nature of a mass in children.

In a study of 26 children with AI, Masiakos et al. reported that 9 of 18 benign lesions had a maximal diameter less than 5 cm, 4 of 8 malignant lesions had a maximal diameters less than 5 cm, and 2 had a diameter less than 3 cm. The mean maximal diameter of benign lesions was 4.2 ± 1.7 cm, whereas the mean maximum diameter of malignant lesions was 5.1 ± 2.3 cm. There was no statistically significant difference between the two comparisons; therefore, this study concluded that children with AI diameters less than 5 cm cannot be treated expectantly [6]. Additionally, this study revealed that malignant lesions occurred significantly more frequently than benign lesions in younger children (mean age 1.7 ± 1.8 years v 7.8 ± 5.9 years; P = 0.02).

In the nonneonatal group of this study, 20 patients with malignant tumors had maximum diameters ranging from 20 to 131 mm, 10 had malignant tumors larger than 60 mm, and 3 had tumors smaller than 40 cm; 18 patients with benign tumors had maximum diameters ranging from 17 to 70 mm, 5 had diameters ranging from 40 to 60 mm, and 5 had diameters larger than 60 mm. Therefore, it is not recommended to use the size of the largest diameter of the tumor to decide whether to wait and observe or intervene surgically for children with AI. Instead, it is necessary to consider the age of the child; laboratory test results, such as whether the tumor indices are elevated or not; whether the tumor has an endocrine function; etc.; and imaging test results to make comprehensive judgments and decisions. Preoperative aggressive evaluation and prompt surgical treatment are recommended for nonneonatal pediatric AI patients.

Adrenal hematoma and NBs are the most common types of adrenal area masses in children, while pheochromocytoma, adrenal cyst, and teratoma are rarer masses [13]. In clinical practice, adrenal hematoma and NB are sometimes difficult to differentiate, especially when adrenal masses are found during the prenatal examination and neonatal period, and such children need to be managed with caution. The Children’s Oncology Group (COG ANBL00B1) implemented the watchful waiting treatment for children under 6 months of age with a solid adrenal mass < 3.1 cm in diameter (or a cystic mass < 5 cm) without evidence of distant metastasis, and if there is a > 50% increase in the adrenal mass volume, there is no return to the baseline VMA or HVA levels, or if there is a > 50% increase in the urinary VMA/HVA ratio or an inversion, surgical resection should be performed [14]. Eighty-three children in this study underwent expectant observation, 16 of whom ultimately underwent surgical resection (8 with INSS stage 1 NB, 1 with INSS stage 2B, 1 with INSS stage 4 S, 2 with low-grade adrenocortical neoplasm, 2 with adrenal hemorrhage, and 2 with extralobar pulmonary sequestration). Most of the children who were observed had a reduced adrenal mass volume. Of the 56 patients who completed the final 90 weeks of expectant observation, 27 (48%) had no residual mass, 13 (23%) had a residual mass volume of 0–1 ml, 8 (14%) had a mass volume of 1–2 ml, and 8 (14%) had a volume of > 2 ml; ultimately, 71% of the residual masses had a volume ≤ 1 ml and 86% had a residual volume ≤ 2 ml. In this study, a total of 16 patients were included in the watchful waiting treatment group; 3 patients underwent surgical treatment during the follow-up period, and 13 patients ultimately completed watchful waiting treatment. After 1–31 months of follow-up, 8 patients’ swelling completely disappeared, and 5 patients’ swelling significantly decreased. After strict screening for indications and thorough follow-up review, AIs in the neonatal period can be subjected to watchful waiting treatment, and satisfactory results can be achieved.

For benign adrenal tumors, laparoscopic surgery is superior to open surgery in terms of successful resection, whereas the feasibility of minimally invasive surgery for AI with preoperative suspicion of malignancy is controversial. The European Cooperative Study Group for Pediatric Rare Tumors recommends that minimally invasive surgery be considered only for early childhood tumors and should be limited to small, localized tumors; additionally, imaging should suggest no invasion of surrounding tissue structures or lymph nodes; and this strategy requires surgeons with extensive experience in oncologic and adrenal surgery [15]. NB is the most common pediatric AI, and open tumor resection remains the mainstay of treatment. For small, early tumors without evidence of invasion on preoperative examination, laparoscopic resection may be considered if the principles of oncologic surgery can be adhered to. If the patient responds to chemotherapy, the decision to perform laparoscopic tumor resection can also be re-evaluated after chemotherapy. According to the current study, the recurrence and mortality rates of laparoscopic surgery are comparable to those of open surgery [16, 17]. The relative contraindications for laparoscopic NB resection include a tumor diameter greater than 6 cm, venous dilatation, and the involvement of adjacent organs or blood vessels [18]. Patients who undergo open adrenalectomy have higher overall survival and recurrence-free survival rates than patients who undergo laparoscopic adrenalectomy [19]. Open adrenalectomy remains the gold standard for surgical resection of adrenocortical carcinoma, whereas laparoscopic adrenalectomy should be reserved for highly selected patients and performed by surgeons with appropriate expertise [20].

Cortical tumors are particularly rare among children with AIs and are sometimes not clearly distinguishable from neurogenic tumors on preoperative imaging; in such patients, the presence of subclinical Cushing’s syndrome needs to be carefully evaluated preoperatively; otherwise, a perioperative adrenal crisis may occur [21]. In patients in whom the possibility of an adrenocortical tumor was considered preoperatively, the assessment for subclinical Cushing’s syndrome mainly involved assessing the serum dehydroepiandrosterone sulfate level and performing an overnight dexamethasone suppression test.

A procedure for evaluating pediatric AI is shown in Fig. 1. Imaging is the first step in the evaluation of AI in children. CT can be used to clarify the nature of most tumors. MRI can be used to evaluate imaging risk factors (IDRFs) for NB. Bone marrow cytomorphology is recommended for all children with AI, along with microscopic residual neuroblastoma testing and further bone scanning if the bone marrow examination is positive. In addition, serum tumor marker levels and other relevant tests should be performed, and hormone levels should be evaluated. If adrenal adenomas cannot be completely excluded during the preoperative examination, a 1 mg overnight dexamethasone suppression test should be performed to exclude subclinical Cushing’s syndrome. In patients with hypertensive hypokalemia, the presence of aldosteronism should be evaluated by testing plasma aldosterone concentrations and plasma renin activity. Adrenal masses found in the neonatal period can be observed if the tumor is small, confined to the adrenal gland and shows no evidence of distant metastasis, while tumors that increase significantly in size during the follow-up period or that are associated with persistently elevated tumor markers require aggressive surgical treatment.

Fig. 1

figure 1

Algorithm for the evaluation and management of a pediatric adrenal incidentaloma. *DST overnight :20µg/kg dexamethasoneweight ˂40 kg,1 mg dexamethasone if ≥ 40 kg. CT = computed tomographic;MRI = magnetic resonance imaging;NSE = neuron-specific enolase;AFP = alpha-fetoprotein;CEA = carcinoembryonic antigen;CA19-9 = cancerantigen19-9;ACTH = adrenocorticotropic hormone;PAC = plasma aldosterone concentration; PRA = plasma renin activity;DST = dexamethasone suppression test

Data availability

The datasets analyzed during the current study are not public, but are available from the corresponding author on reasonable request.

Abbreviations

CT:
computed tomographic
MRI:
magnetic resonance imaging
ACTH:
adrenocorticotropic hormone
VMA:
vanillylmandelic acid
HVA:
homovanillic Acid
AFP:
alpha-fetoprotein
CEA:
carcinoembryonic antigen
NSE:
neuron-specific enolase
CA19-9:
cancerantigen19-9
FH:
favorable histology
HU:
Hounsfiled Unit
COG:
Children’s Oncology Group
INSS:
International Neuroblastoma Staging System

References

  1. Barzon L, Sonino N, Fallo F, Palu G, Boscaro M. Prevalence and natural history of adrenal incidentalomas. Eur J Endocrinol. 2003;149(4):273–85.

    Article CAS PubMed Google Scholar

  2. Maas M, Nassiri N, Bhanvadia S, Carmichael JD, Duddalwar V, Daneshmand S. Discrepancies in the recommendedmanagement of adrenalincidentalomas by variousguidelines. J Urol. 2021;205(1):52–9.

    Article PubMed Google Scholar

  3. Fassnacht M, Tsagarakis S, Terzolo M, et al. European Society of Endocrinology clinical practice guidelines on the management of adrenal incidentalomas, in collaboration with the European network for the study of adrenal tumors. Eur J Endocrinol. 2023;189(1):G1–42.

    Article PubMed Google Scholar

  4. Young WFJr. Clinical practice. The incidentally discovered adrenal mass. N Engl J Med. 2007;356(6):601–10.

    Article Google Scholar

  5. Rowe NE, Kumar R, Schieda N, et al. Diagnosis, management, and follow-up of the incidentallydiscoveredadrenalmass: CUAguidelineendorsed by the AUA. J Urol. 2023;210(4):590–9.

    Article PubMed Google Scholar

  6. Masiakos PT, Gerstle JT, Cheang T, Viero S, Kim PC, Wales P. Is surgery necessary for incidentally discovered adrenal masses in children?J. Pediatr Surg. 2004;39(5):754–8.

    Article Google Scholar

  7. Lee JM, Kim MK, Ko SH et al. Clinical guidelines for the management of adrenal incidentaloma. Endocrinol Metab. 2017;32(2).

  8. Terzolo M, Stigliano A, Chiodini I, et al. AME position statement on adrenal incidentaloma. Eur J Endocrinol. 2011;164(6):851–70.

    Article CAS PubMed Google Scholar

  9. Boland GW, Blake MA, Hahn PF, Mayo-Smith WW. Incidental adrenal lesions: principles, techniques, and algorithms for imaging characterization. Radiology. 2008;249(3):756–75.

    Article PubMed Google Scholar

  10. Payabyab EC, Balasubramaniam S, Edgerly M, et al. Adrenocortical cancer: a molecularlycomplexdiseasewheresurgerymatters. Clin Cancer Res. 2016;22(20):4989–5000.

    Article CAS PubMed Google Scholar

  11. Angeli A, Osella G, Alì A, Terzolo M. Adrenal incidentaloma: an overview of clinical and epidemiological data from the National Italian Study Group. Horm Res. 1997;47(4–6):279–83.

    Article CAS PubMed Google Scholar

  12. Grumbach MM, Biller BM, Braunstein GD, et al. Management of the clinically inapparent adrenal mass (incidentaloma). Ann Intern Med. 2003;138(5):424–9.

    Article PubMed Google Scholar

  13. Zhang K, Zhang Y, Zhang Y, Chao M. A retrospective analysis of the clinical characteristics of 207 hospitalized children with adrenal masses. Front Pediatr. 2023;11:1215095.

    Article PubMed PubMed Central Google Scholar

  14. Nuchtern JG, London WB, Barnewolt CE, et al. A prospective study of expectant observation as primary therapy for neuroblastoma in young infants: a Children‘s oncology group study. Ann Surg. 2012;256(4):573–80.

    Article PubMed Google Scholar

  15. Virgone C, Roganovic J, Vorwerk P, et al. Adrenocortical tumours in children and adolescents: the EXPeRT/PARTNER diagnostic and therapeutic recommendations. Pediatr Blood Cancer. 2021;68(suppl 4):e29025.

    Article PubMed Google Scholar

  16. Chang S, Lin Y, Yang S, et al. Safety and feasibility of laparoscopic resection of abdominal neuroblastoma without image-defined risk factors: a single-center experience. World J Surg Oncol. 2023;21(1):113.

    Article PubMed PubMed Central Google Scholar

  17. Zenitani M, Yoshida M, Matsumoto S, et al. Feasibility and safety of laparoscopic tumor resection in children with abdominal neuroblastomas. Pediatr Surg Int. 2023;39(1):91.

    Article PubMed Google Scholar

  18. International Pediatric Endosurgery Group. IPEG guidelines for the surgical treatment of adrenal masses in children. J Laparoendosc Adv Surg Tech A. 2010;20(2):vii–ix.

    Google Scholar

  19. Nakanishi H, Miangul S, Wang R, et al. Open versuslaparoscopicsurgery in the management of adrenocorticalcarcinoma: a systematicreview and meta-analysis. Ann Surg Oncol. 2023;30(2):994–1005.

    Article PubMed Google Scholar

  20. Gaillard M, Razafinimanana M, Challine A, et al. Laparoscopic or openadrenalectomy for stage I-IIadrenocorticalcarcinoma: a retrospectivestudy. J Clin Med. 2023;12(11):3698.

    Article PubMed PubMed Central Google Scholar

  21. Utsumi T, Iijima S, Sugizaki Y, et al. Laparoscopic adrenalectomy for adrenal tumors with endocrine activity: perioperative management pathways for reduced complications and improved outcomes. Int J Urol. 2023;30(10):818–26.

    Article CAS PubMed Google Scholar

Download references

Acknowledgements

We would like to express our deepest gratitude to all the patients and their parents who participated in this study. Their patience and cooperation were instrumental to the success of this research. We thank our colleagues in the Department of Radiology for their invaluable contributions in diagnosing and monitoring the progression of adrenal incidentalomas. We sincerely appreciate the hard work of the pathologists in diagnosing and classifying tumors, which laid the foundation for our study. Finally, we would like to thank our institution for providing the necessary resources and an enabling environment to conduct this research.

Funding

Not applicable.

Author information

Authors and Affiliations

  1. Department of Urology, Children’s Hospital of Nanjing Medical University, 72 Guangzhou Road, Nanjing, 210008, Jiangsu, China

    Xiaojiang Zhu, Saisai Liu, Yimin Yuan, Nannan Gu, Jintong Sha, Yunfei Guo & Yongji Deng

Contributions

X.J.Z. and Y.J.D designed the study; S.S.L., Y.M.Y., N.N.G., and J.T.S. carried out the study and collected important data; X.J.Z. analysed data and wrote the manuscript; Y.F.G. and Y.J.D.gave us a lot of very good advices and technical support; All authors read and approved the final manuscript.

Corresponding author

Correspondence to Yongji Deng.

Ethics declarations

Competing interests

The authors declare no competing interests.

Ethics approval and consent to participate

Ethics approval for this study was granted by the Ethics Committee of Children’s Hospital of Nanjing Medical University. Informed written consent was obtained from all the guardians of the children and we co-signed the informed consent form with their parents before the study. We confirmed that all methods were performed in accordance with relevant guidelines and regulations.

Conflict of interest

There are no conflicts of interest.

Additional information

Publisher’s Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Filed under: Cushing's | Tagged: , , , , , , , | Leave a comment »

Cushing Syndrome due to a CRH- and ACTH-Secreting Silent Pheochromocytoma

Posted on February 26, 2024 by MaryO

Highlights

  • EAS should be considered in patients presenting with rapid progression of ACTH-dependent hypercortisolism causing severe clinical and metabolic abnormalities.
  • Ectopic ACTH secretion by a pheochromocytoma should be suspected in cases of ACTH-dependent Cushing syndrome in the presence of an adrenal mass.
  • If required, medical management with steroidogenesis inhibitors can be initiated at the time of EAS diagnosis to control clinical and metabolic derangements associated with severe hypercortisolemia
  • In patients with ACTH-dependent Cushing syndrome from an ectopic source, inhibiting steroidogenesis should be reserved for cases where the initial diagnosis is unclear or patients who are not suitable candidates for surgery.
  • Unilateral adrenalectomy is indicated in the management of ACTH/CRH-secreting pheochromocytomas and is typically curative.
  • Catecholamine blockade should be started prior to surgical removal of catecholamines-secreting pheochromocytomas.
  • A multidisciplinary approach is required to diagnose and manage this condition.

Abstract

Background/Objective

Ectopic co-secretion of corticotropin-releasing hormone (CRH) and adrenocorticotropic hormone (ACTH) in silent (i.e., noncatecholamine-secreting) pheochromocytoma is a rare cause of Cushing Syndrome (CS).

Case Report

A 57-year-old woman rapidly developed hypercortisolism, clinically manifesting as fatigue, muscle weakness, weight gain, and worsening hypertension, and biochemically characterized by hypokalemia and marked elevation of serum cortisol and plasma ACTH. This acute presentation suggested a diagnosis of ectopic ACTH syndrome (EAS). Imaging studies revealed a right adrenal mass that enhanced after administration of the radioisotope 68Ga-DOTATATE. Plasma metanephrines were normal in two separate measurements. The possibility of a silent pheochromocytoma was considered. After controlling her hypercortisolism with metyrapone and surgical preparation with alpha blockade, the patient underwent elective right adrenalectomy. Pathology revealed a pheochromocytoma that stained focally for ACTH and CRH. Postoperatively, cortisol levels normalized, the hypothalamic–pituitary–adrenal (HPA) axis was not suppressed, and clinical symptoms from hypercortisolism abated.

Discussion

Patients who exhibit a rapid progression of ACTH-dependent hypercortisolism should be screened for ectopic ACTH syndrome (EAS). The use of functional imaging radioisotopes (such as gallium DOTA-peptides), improves the detection of ACTH-secreting tumors. Preoperative treatment with steroidogenesis inhibitors helps control clinical and metabolic derangements associated with severe hypercortisolemia, while alpha blockade prevents the onset of an adrenergic crisis.

Conclusion

We present a rare case of EAS due to a silent pheochromocytoma that co-secreted ACTH and CRH. Pheochromocytoma should be considered in patients with EAS who have an adrenal mass even in the absence of excessive catecholamine secretion.

Key words

ectopic ACTH syndrome
Cushing Syndrome
non-catecholamine-secreting pheochromocytoma

Abbreviations

EAS

ectopic ACTH syndrome
CS

Cushing Syndrome
CRH

corticotropin-releasing hormone
ACTH

adrenocorticotropic hormone
DHEA-S

dehydroepiandrosterone sulfate
UFC

urine free cortisol
PRA

plasma renin activity

Introduction

Cushing Syndrome (CS) is rare, with an estimated incidence of 0.2-5.0 per million people per year, and prevalence of 39-79 per million (1). Ectopic ACTH Syndrome (EAS), a type of CS originating from extra-pituitary ACTH-secreting tumors, is uncommon. The prevalence of CS due to ACTH-secreting adrenal medullary lesions is not well established. However, EAS is observed in approximately 1.3% of all identified cases of pheochromocytoma (2). Recognizing EAS can be challenging due to its rarity, leading to delayed diagnosis.

Neuroendocrine neoplasms can produce CRH, which can lead to the secretion of ACTH by the pituitary. In certain cases, co-secretion of ACTH and CRH by an adrenal neoplasm has been observed. Only two published cases have provided definitive biochemical and immunohistochemical evidence of exclusive CRH secretion (3).

Case Report

A 57-year-old woman with a history of well-controlled hypertension sought care due to a two-month history of 60 lb weight gain, facial rounding, easy bruising, muscle weakness, lower extremity edema and acne. Her blood pressure control had worsened, and laboratory tests showed a markedly low serum potassium level of 1.8 mmol/L while taking hydrochlorothiazide. To manage her blood pressure, she was prescribed a calcium channel blocker, an angiotensin receptor blocker, and potassium supplements. However, her symptoms worsened, and she was referred to our emergency department. Blood pressure at presentation to our hospital was 176/86 mmHg. She had characteristic features of CS, including face rounding, supraclavicular fullness, dorsocervical fat accumulation, pedal edema, oral candidiasis, multiple forearm ecchymoses, and acneiform skin eruptions. No visible abdominal striae were present. She had no family history of pheochromocytoma, or multiple endocrine neoplasia type 2.

Serum cortisol level was 128 mcg/dL (normal range: 4.6-23.4) at 5 PM, with an ACTH level of 1055 pg/mL (normal range: 6-50); serum DHEA-S level was elevated at 445 mcg/dL (normal range: 8-188). Her 24-hour urine cortisol was at 12,566 mcg (normal range: 4.0-50.0). Plasma metanephrines were normal at <25 pg/mL (normal range: <57), and plasma normetanephrine was 44 (normal range: <148). A second plasma metanephrine measurement showed similar results. Serum aldosterone level and plasma renin activity were low at 2 ng/dL (normal range: 3-16) and 0.11 ng/mL/h (normal range: 0.25-5.82), respectively. Dopamine and methoxytyramine levels were not measured. An abdominal CT revealed a 4.8 x 4.5 x 5 cm right heterogeneously enhancing adrenal mass with a mean Hounsfield Unit of 68 in the non-contrast phase, and an absolute percentage washout of 30% (Fig 1A). The left adrenal gland appeared hyperplastic (Fig 1B). An Octreoscan, which was the in-hospital available nuclear medicine imaging modality, confirmed a 5.1 cm adrenal mass that was mild to moderately avid, with diffuse bilateral thickening of the adrenal glands and no other focal radiotracer avidity. A pituitary MRI did not show an adenoma, and EAS was suspected. Further evaluation with 68Ga-DOTATATE PET/CT (Fig 2) performed after her admission demonstrated an avid right adrenal mass consistent with a somatostatin receptor-positive lesion. No other suspicious tracer uptake was detected. These findings were consistent with a neuroendocrine tumor, such as pheochromocytoma.

  1. Download : Download high-res image (261KB)
  2. Download : Download full-size image

Fig. 1. Preoperative abdominal computed tomography scan showing a 4.8 x 4.5 x 5 cm right heterogeneously enhancing adrenal mass with irregular borders (A) and a hyperplastic left adrenal gland (B).

  1. Download : Download high-res image (219KB)
  2. Download : Download full-size image

Fig 2. 68Ga-DOTATATE PET/CT showing an avid right adrenal mass.

To control her symptoms while undergoing workup, the patient received oral metyrapone 500 mg thrice daily and oral ketoconazole 200 mg twice daily. Ketoconazole was stopped due to an increase in transaminases. The dosage of metyrapone was increased to 500 mg four times daily and later decreased to alternating doses of 250 mg and 500 mg four times daily. Within 3 weeks of starting medical therapy, serum cortisol level normalized at 20 mcg/dL. The 24-hour UFC improved to 246.3 mcg/24h. She experienced gradual improvement in facial fullness, acne, and blood pressure control.

The possibility of a silent pheochromocytoma was considered, and a-adrenergic blockade with doxazosin 1 mg daily was started 1 month prior surgery. She underwent surgery after two months of metyrapone therapy. With an unclear diagnosis and a large, heterogeneous adrenal mass, the surgical team elected to perform open adrenalectomy for en bloc resection due to concerns for an adrenal malignancy. The tumor was well-demarcated and did not invade surrounding structures (Figure 3A). H&E-stained sections showed classic morphologic features of a pheochromocytoma (Figure 3B), with immunohistochemistry demonstrating strong immunoreactivity for synaptophysin and chromogranin, and negative SF- I and inhibin stains excluding an adrenal cortical lesion. The sections analyzed by QuPath (4) revealed that approximately 4% of ce11s were ACTH cells, often found in isolation, and had a clear, high signal-to-noise staining (Figure 3C). CRH cells were less prevalent, comprising about 2.4% of the total analyzed cells, and tended to cluster together (Figure 3D). These cells had more background staining, resulting in a lower signal- to-noise ratio.

  1. Download : Download high-res image (663KB)
  2. Download : Download full-size image

Figure 3. Gross and Histopathological analysis of the patient’s pheochromocytoma. (A) Image of the gross excised specimen. (B) H&E staining (200x final magnification) demonstrates prominent vascularity and cells with finely granular, eosinophilic cytoplasm and salt-and-pepper chromatin. (C) ACTH staining (200x final magnification) shows clear and isolated positive cells, representing about 4.0% of the section analyzed by QuPath. (D) CRH staining (200x final magnification) reveals tight clusters of positive cells, accounting for 2.4% of the total cells. Positive (human placenta and hypothalamus) and negative (thyroid gland) control tissues performed as expected (data not shown).

The patient’s postoperative recovery was uneventful, with a short course of hydrocortisone which was stopped 1 week after surgery after HPA axis evaluation showed normal results. After one month, hypercortisolism had resolved, as shown by a normal 24-hour UFC at 28 mcg.

Administration of dexamethasone at 11 PM resulted in suppression of morning cortisol to 0.8 and 0.6 mcg/dL 1 and 7 months after surgery, respectively. Her liver function tests normalized, and blood pressure was well-controlled with amlodipine 10 mg daily and losartan 100 mg daily. Genetic testing for pheochromocytoma predisposition syndromes is currently planned.

Discussion

EAS accounts for 10-20% of cases of ACTH-dependent CS (5). This condition can be caused by several neuroendocrine neoplasms that produce bioactive ACTH (6) In the literature, we have found 99 documented cases of EAS caused by a pheochromocytoma. Of these, 93% showed ACTH expression. Only two cases have been reported with dual staining of ACTH and CRH (7). Exclusive CRH production has only been reported in two cases (8:9). However, the true prevalence of CRH-producing pheochromocytomas might be underestimated, as most cases testing for CRH expression was not performed.

Although the clinical presentation of EAS may be highly variable, there is often a rapid onset of hypercortisolism accompanied by severe catabolic symptoms. The diagnostic process should focus on identifying the location of a potential neuroendocrine neoplasm responsible for the ACTH secretion. Sometimes the peripheral origin of ACTH must be confirmed by inferior petrosal sinus sampling (IPSS). In this case, given the clinical presentation consistent with EAS, negative pituitary MRI, and the presence of an adrenal mass that needed to be removed independently, IPSS was not performed.

Neuroendocrine neoplasms express somatostatin receptors on their surface, which allow functional imaging using [11 lln]-pentetreotide (Octreoscan). However, Octreoscan has a low sensitivity in detecting occult EAS. In cases where the tumor is in the abdomen and pelvis, Octreoscan has limited utility in locating the source of ACTH (10). This increased risk of false negatives is caused by physiological tracer uptake by the liver, spleen, urinary tract, bowel, and gallbladder. The use of Gallium-68 labeled somatostatin receptor ligands (PET/CT 68Ga-DOTATATE) is more effective in detecting somatostatin receptors (SSTR2) than [11lln]-pentetreotide due to its higher spatial resolution and affinity (11)_ This test was performed after discharge form the hospital to rule out the presence of a second, smaller neuroendocrine tumor that the Octreoscan might have missed. A new molecular imaging technique targeting CRH receptors (68Ga CRH PET/CT) has shown potential in identifying tumors expressing CRH, but its availability remains limited (12). In our patient’s case, both the Octreoscan and 68Ga- DOTATATE successfully identified the adrenal tumor as a potential ACTH/CRH secretion source.

According to relevant guidelines, presurgical adrenergic blockade is recommended for patients with biochemical evidence of catecholamine excess (13, 14). Conversely, silent pheochromocytomas can generally be operated without alpha blockade (15). Despite this, we opted to administer pre-operative alpha blockade as a precautionary measure for this patient.

Pathology examination confirmed the diagnosis of pheochromocytoma. ACTH and CRH staining demonstrated that clear and significant populations of two separate ACTH and CRH positive cells were present in the excised pheochromocytoma. ACTH/CRH cells were dispersed throughout various regions of the pheochromocytoma rather than being well-defined, separate histological entities. As a result, there is no indication that this resulted from collision tumors, but rather random mutation and expansion of tumor cells into ACTH or CRH secreting cells. These results have limitations, including variation in ACTH and CRH expressing regions due to tumor heterogeneity, nonspecific binding of polyclonal antibodies, and normal low-rate false negative/positive detection using QuPath.

Post-surgical normal HPA activity was likely due to the de-suppression of the HPA axis by medical therapy, but it may also be explained by chronic stimulation of corticotroph cells induced by ectopic CRH secretion.

The standard approach to managing EAS involves surgical intervention. However, surgery may not be a viable option in cases where the source of ACTH production is unknown. Medical therapy to reduce or block excess cortisol can be used in such circumstances.

Conclusions

In conclusion, a pheochromocytoma causing EAS should be considered even in the absence of elevated plasma metanephrines. These tumors may simultaneously express ACTH and CRH.CRH.

References

Cited by (0)

Sources of support: None

Permission in the form of written consent from patient for use of actual test results was obtained.

Cushing in silent pheochromocytoma

Clinical Relevance

This case highlights the importance of considering ectopic ACTH secretion by a pheochromocytoma in patients presenting with rapid progression and considerable clinical hypercortisolism concomitant with an adrenal mass and elevated plasma ACTH. This represents an unusual manifestation of a specific subtype of ACTH/CRH-secreting pheochromocytoma that did not exhibit catecholamine secretion

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper

∗

These 2 authors contributed equally to this work

From https://www.sciencedirect.com/science/article/pii/S2376060524000075

Filed under: adrenal, Cushing's, Rare Diseases | Tagged: , , , | Leave a comment »

Hormones and High Blood Pressure: Study Reveals Endocrine Culprits and Targeted Treatments

Posted on October 20, 2023 by MaryO

In a recent study published in Hypertension Research, scientists examine the endocrine causes of hypertension (HTN) and investigate the efficacy of treatments to alleviate HTN.

 

What is HTN?

About 30% of the global population is affected by HTN. HTN is a modifiable cardiovascular (CV) risk factor that is associated with a significant number of deaths worldwide.

There are two types of HTN known as primary and secondary HTN. As compared to primary HTN, secondary HTN causes greater morbidity and mortality.

The most common endocrine causes of HTN include primary aldosteronism (PA), paragangliomas and pheochromocytomas (PGL), Cushing’s syndrome (CS), and acromegaly. Other causes include congenital adrenal hyperplasia, mineralocorticoid excess, cortisol resistance, Liddle syndrome, Gordon syndrome, and thyroid and parathyroid dysfunction.

What is PA?

PA is the most common endocrine cause of hypertension, which is associated with excessive aldosterone secretion by the adrenal gland and low renin secretion. It is difficult to estimate the true prevalence of PA due to the complexity of its diagnosis.

Typically, the plasma aldosterone-to-renin ratio (ARR) is measured to diagnose PA. The diagnosis of PA can also be confirmed using other diagnostic tools like chemiluminescent enzyme immunoassays (CLEIAs) and radio immune assay (RIA).

Continuous aldosterone secretion is associated with organ damage due to chronic activation of the mineralocorticoid (MR) receptor in many organs, including fibroblasts and cardiomyocytes. An elevated level of aldosterone causes diastolic dysfunction, endothelial dysfunction, left ventricular hypertrophy, and arterial stiffness.

Increased aldosterone secretion also leads to obstructive sleep apnea and increases the risk of osteoporosis. This is why individuals with PA are at a higher risk of cardiovascular events (CVDs), including heart failure, myocardial infarction, coronary artery disease, and atrial fibrillation.

PA is treated by focusing on normalizing potassium and optimizing HTN and aldosterone secretion. Unilateral adrenalectomy is a surgical procedure proposed to treat PA.

Young patients who are willing to stop medication are recommended surgical treatment. The most common pharmaceutical treatment for PA includes mineralocorticoid receptor antagonists such as spironolactone and eplerenone.

Pheochromocytomas and paragangliomas

PGL are tumors that develop at the thoracic-abdominal-pelvic sympathetic ganglia, which are present along the spine, as well as in the parasympathetic ganglia located at the base of the skull. The incidence rate of PGL is about 0.6 for every 100,000 individuals each year. PGL tumors synthesize excessive catecholamines (CTN), which induce HTN.

Some of the common symptoms linked to HTN associated with PGL are palpitations, sweating, and headache. PGL can be diagnosed by determining metanephrines (MN) levels, which are degraded products of CTN. Bio-imaging tools also play an important role in confirming the diagnosis of PGL.

Excessive secretion of CTN increases the risk of CVDs, including Takotsubo adrenergic heart disease, ventricular or supraventricular rhythm disorders, hypertrophic obstructive or ischaemic cardiomyopathy, myocarditis, and hemorrhagic stroke. Excessive CTN secretion also causes left ventricular systolic and diastolic dysfunction.

Typically, PGL treatment is associated with surgical procedures. Two weeks before the surgery, patients are treated with alpha-blockers. For these patients, beta-blockers are not used as the first line of treatment without prior use of alpha-adrenergic receptors.

Patients with high CTN secretion are treated with metyrosine, as this can inhibit tyrosine hydroxylase. Hydroxylase converts tyrosine into dihydroxyphenylalanine, which is related to CTN synthesis.

What is CS?

CS, which arises due to persistent exposure to glucocorticoids, is a rare disease with an incidence rate of one in five million individuals each year. The most common symptoms of CS include weight gain, purple stretch marks, muscle weakness, acne, and hirsutism. A high cortisol level causes cardiovascular complications such as HTN, hypercholesterolemia, and diabetes.

CS is diagnosed based on the presence of two or more biomarkers that can be identified through pathological tests, such as salivary nocturnal cortisol, 24-hour urinary-free cortisol, and dexamethasone suppression tests.

CS is treated through surgical procedures based on the detected lesions. Patients with severe CS are treated with steroidogenic inhibitors, such as metyrapone, ketoconazole, osilodrostat, and mitotane. Pituitary radiotherapy and bilateral adrenalectomy are performed when other treatments are not effective.

Acromegaly

Acromegaly arises due to chronic exposure to growth hormone (GH), leading to excessive insulin-like growth factor 1 (IGF1) synthesis. This condition has a relatively higher incidence rate of 3.8 million person-years. Clinical symptoms of acromegaly include thickened lips, widened nose, a rectangular face, prominent cheekbones, soft tissue overgrowth, or skeletal deformities.

Prolonged exposure to GH leads to increased water and sodium retention, insulin resistance, reduced glucose uptake, and increased systemic vascular resistance. These conditions increase the risk of HTN and diabetes in patients with acromegaly. Acromegalic patients are also at a higher risk of cancer, particularly those affecting the thyroid and colon.

Acromegaly is diagnosed using the IGF1 assay, which determines IGF1 levels in serum. After confirming the presence of high IGF1 levels, a GH suppression test must be performed to confirm the diagnosis. Bioimaging is also conducted to locate adenoma.

Acromegaly is commonly treated through surgical procedures. Patients who refuse this line of treatment are treated with somatostatin receptor ligands, growth hormone receptor antagonists, dopaminergic agonists, or radiotherapy.

Journal reference:
  • De Freminville, J., Amar, L., & Azizi, M. (2023) Endocrine causes of hypertension: Literature review and practical approach. Hypertension Research; 1-14. doi:10.1038/s41440-023-01461-1

From https://www.news-medical.net/news/20231015/Hormones-and-high-blood-pressure-Study-reveals-endocrine-culprits-and-targeted-treatments.aspx

Filed under: adrenal, Cushing's, pituitary, Rare Diseases, symptoms, Treatments | Tagged: , , , , , , , , , , , , | Leave a comment »

Next Page »