Transsphenoidal Surgery Recommended for Cushing Disease With Inconclusive or Normal MRI

Posted on May 25, 2019 by MaryO

In patients with a diagnosis of Cushing disease in whom magnetic resonance imaging (MRI) shows either no abnormalities or nonspecific abnormalities, surgery is preferable to medical treatment, according to study results published in The Journal of Clinical Endocrinology & Metabolism.

There is a consensus that the first line of treatment for Cushing disease is transsphenoidal surgery to remove the pituitary adenoma causing the disease, with an 80% remission rate following the intervention. However, in the absence of clear evidence of a pituitary adenoma on imaging, there is some controversy regarding the best treatment.

The goal of this retrospective single-center study was to assess the outcomes of surgery in patients with Cushing disease with clear evidence of a pituitary adenoma on MRI compared with outcomes in patients with inconclusive or normal MRI.

The cohort included 195 patients treated with transsphenoidal surgery between 1992 and 2018 (156 women; mean age at surgery, 41 years) classified into 4 MRI groups: 89 patients were found to have microadenoma, 18 had macroadenoma, 44 had nonspecific/inconclusive abnormalities on MRI results, and 44 had normal imaging results.

The researchers reported that MRI performance in their neuroradiology department improved with time; the proportion of inconclusive or normal MRI results decreased from 60% in 1992 to 1996 to 27% in 2012 to 2018 (P =.037).

In analyzing the influence of MRI findings on remission rates, the researchers found no significant difference among the 4 groups: remission rate was 85% for microadenomas, 94% for macroadenomas, 73% for inconclusive MRI, and 75% for negative MRI (P =.11). This finding indicates the overall percentage of patients in remission after transsphenoidal surgery is only slightly lower in those with normal or inconclusive MRI results compared with patients with clear evidence of microadenoma or macroadenoma.

There was no difference in remission rate after a microscopic vs endoscopic surgical approach (P =.16). The researchers found that endoscopic-assisted surgery allowed a higher visualization rate than microscopic-assisted surgery. Although the neurosurgeon had a better visualization rate than MRI (100% vs 72%, respectively), there were some false-positive findings; thus, positive predictive value was similar (84% vs 78%, respectively).

The study had several limitations including the retrospective design. In addition, in light of the long study duration, the researchers noted that changes in MRI technology and surgical procedures occurred over time.

The researchers proposed that after exclusion of nonneoplastic hypercortisolism, patients with Cushing disease, an inconclusive or normal MRI, and a pituitary adrenocorticotropic hormone gradient at bilateral inferior petrosal sampling be directed to an expert neurosurgeon for transsphenoidal surgery rather than treated medically.

 

Reference

Cristante J, Lefournier V, Sturm N, et al. Why we should still treat by neurosurgery patients with Cushing’s disease and a normal or inconclusive pituitary MRI [published online May 14, 2019]. J Clin Endocrinol Metab. doi:10.1210/jc.2019-00333

From https://www.endocrinologyadvisor.com/home/topics/adrenal/transsphenoidal-surgery-recommended-for-cushing-disease-with-inconclusive-or-normal-mri/

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Imaging Agent Effectively Detects, Localizes Tumors in Cushing’s Syndrome

Posted on May 20, 2019 by MaryO

Wannachalee T, et al. Clin Endocrinol. 2019;doi:10.1111/cen.14008.
May 20, 2019

A radioactive diagnostic agent for PET imaging effectively localized primary tumors or metastases in most adults with ectopic Cushing’s syndrome, leading to changes in clinical management for 64% of patients, according to findings from a retrospective study published in Clinical Endocrinology.

As Endocrine Today previously reported, the FDA approved the first kit for the preparation of gallium Ga-68 dotatate injection (Netspot, Advanced Accelerator Applications USA Inc.), a radioactive diagnostic agent for PET scan imaging, in June 2016. The radioactive probe is designed to help locate tumors in adult and pediatric patients with somatostatin receptor-positive neuroendocrine tumors. Ga-68 dotatate, a positron-emitting analogue of somatostatin, works by binding to the hormone.

In a retrospective review, Richard Auchus, MD, PhD, professor of pharmacology and internal medicine in the division of metabolism, endocrinology and diabetes at the University of Michigan, and colleagues analyzed data from 28 patients with ectopic Cushing’s syndrome who underwent imaging with gallium Ga-68 dotatate for identification of the primary tumor or follow-up between November 2016 and October 2018 (mean age, 50 years; 22 women). All imaging was completed at tertiary referral centers at Mayo Clinic, University of Michigan and The University of Texas MD Anderson Cancer Center. Researchers assessed patient demographics, imaging modalities, histopathological results and treatment data. Diagnosis of Cushing’s syndrome was confirmed by clinical and hormonal evaluation. The clinical impact of gallium Ga-68 dotatate was defined as the detection of primary ectopic Cushing’s syndrome or new metastatic foci, along with changes in clinical management.

Within the cohort, 17 patients underwent imaging with gallium Ga-68 dotatate for identification of the primary tumor and 11 underwent the imaging for follow-up. Researchers found that gallium Ga-68 dotatate identified suspected primary ectopic Cushing’s syndrome in 11 of 17 patients (65%), of which seven tumors were solitary and four were metastatic. Diagnosis was confirmed by pathology in eight of the 11 patients: Five patients had a bronchial neuroendocrine tumor, one patient had a thymic tumor, one had a pancreatic neuroendocrine tumor, and one metastatic neuroendocrine tumor was of unknown primary origin. One patient had a false positive scan, according to researchers.

Among the 11 patients with ectopic Cushing’s syndrome who underwent gallium Ga-68 dotatate imaging to assess disease burden or recurrence, the imaging led to changes in clinical management in seven cases (64%), according to researchers.

“Our study demonstrates the high sensitivity of [gallium Ga-68 dotatate] in the localization of [ectopic Cushing’s syndrome], for both occult primary tumors and metastatic lesions,” the researchers wrote. “Importantly, the use of [gallium Ga-68 dotatate] impacted clinical management in 64% of patients with [ectopic Cushing’s syndrome] overall.”

The researchers noted that the high cost and limited availability of PET/CT imaging might preclude the widespread use of gallium Ga-68 dotatate for imaging in patients with suspected ectopic Cushing’s syndrome, and that experience with the scans remains limited vs. other imaging studies.

“Nevertheless, combing the experience of three large referral centers, our study gathers the largest number of [patients with ectopic Cushing’s syndrome] imaged with [gallium Ga-68 dotatate] to date and provides a benchmark for the utility of this diagnostic modality for this rare but highly morbid condition,” the researchers wrote. – by Regina Schaffer

Disclosures: The authors report no relevant financial disclosures.

From https://www.healio.com/endocrinology/adrenal/news/online/%7B69e458a8-e9a0-4567-a786-00868118b435%7D/imaging-agent-effectively-detects-localizes-tumors-in-cushings-syndrome

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Metoclopramide Can Mask Adrenal Insufficiency After Gland Removal in BMAH Patients

Posted on May 8, 2019 by MaryO

Metoclopramide, a gastrointestinal medicine, can increase cortisol levels after unilateral adrenalectomy — the surgical removal of one adrenal gland — and conceal adrenal insufficiency in bilateral macronodular adrenal hyperplasia (BMAH) patients, a case report suggests.

The study, “Retention of aberrant cortisol secretion in a patient with bilateral macronodular adrenal hyperplasia after unilateral adrenalectomy,” was published in Therapeutics and Clinical Risk Management.

BMAH is a subtype of adrenal Cushing’s syndrome, characterized by the formation of nodules and enlargement of both adrenal glands.

In this condition, the production of cortisol does not depend on adrenocorticotropic hormone (ACTH) stimulation, as usually is the case. Instead, cortisol production is triggered by a variety of stimuli, such as maintaining an upright posture, eating mixed meals — those that contain fats, proteins, and carbohydrates — or exposure to certain substances.

A possible treatment for this condition is unilateral adrenalectomy. However, after the procedure, some patients cannot produce adequate amounts of cortisol. That makes it important for clinicians to closely monitor the changes in cortisol levels after surgery.

Metoclopramide, a medicine that alleviates gastrointestinal symptoms and is often used during the postoperative period, has been reported to increase the cortisol levels of BMAH patients. However, the effects of metoclopramide on BMAH patients who underwent unilateral adrenalectomy are not clear.

Researchers in Japan described the case of a 61-year-old postmenopausal woman whose levels of cortisol remained high after surgery due to metoclopramide ingestion.

The patient was first examined because she had experienced high blood pressure, abnormal lipid levels in the blood, and osteoporosis for ten years. She also was pre-obese.

She was given medication to control blood pressure with no results. The lab tests showed high serum cortisol and undetectable levels of ACTH, suggesting adrenal Cushing’s syndrome.

Patients who have increased cortisol levels, but low levels of ACTH, often have poor communication between the hypothalamus, the pituitary, and the adrenal glands. These three glands — together known as the HPA axis — control the levels of cortisol in healthy people.

Imaging of the adrenal glands revealed they were both enlarged and presented nodules. The patient’s cortisol levels peaked after taking metoclopramide, and her serum cortisol varied significantly during the day while ACTH remained undetectable. These results led to the BMAH diagnosis.

The doctors performed unilateral adrenalectomy to control cortisol levels. The surgery was successful, and the doctors reduced the dose of glucocorticoid replacement therapy on day 6.

Eight days after the surgery, however, the patient showed decreased levels of fasting serum cortisol, which indicated adrenal insufficiency — when the adrenal glands are unable to produce enough cortisol.

The doctors noticed that metoclopramide was causing an increase in serum cortisol levels, which made them appear normal and masked the adrenal insufficiency.

They stopped metoclopramide treatment and started replacement therapy (hydrocortisone) to control the adrenal insufficiency. The patient was discharged 10 days after the surgery.

The serum cortisol levels were monitored on days 72 and 109 after surgery, and they remained lower than average. Therefore she could not stop hydrocortisone treatment.

The levels of ACTH remained undetectable, suggesting that the communication between the HPA axis had not been restored.

“Habitual use of metoclopramide might suppress the hypothalamus and pituitary via negative feedback due to cortisol excess, and lead to a delayed recovery of the HPA axis,” the researchers said.

Meanwhile, the patient’s weight decreased, and high blood pressure was controlled.

“Detailed surveillance of aberrant cortisol secretion responses on a challenge with exogenous stimuli […] is clinically important in BMAH patients,” the study concluded. “Caution is thus required for assessing the actual status of the HPA axis.”

From https://cushingsdiseasenews.com/2019/05/07/metoclopramide-conceals-adrenal-insufficiency-after-gland-removal-bmah-patients-case-report/

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Novel Therapy Eases Cushing’s Symptoms in Pivotal Trial

Posted on April 27, 2019 by MaryO

by Kristen Monaco, Staff Writer, MedPage Today

LOS ANGELES — An investigational therapy improved quality of life and reduced disease symptoms for patients with endogenous Cushing’s syndrome, according to new findings from the phase III SONICS study.

Patients taking oral levoketoconazole twice daily had significant reductions in mean scores for acne (-1.8), peripheral edema (-0.4), and hirsutism (-2.6), all secondary endpoints of the pivotal trial (P<0.03 for all), reported Maria Fleseriu, MD, of Oregon Health and Science University in Portland.

“We’re looking forward to see the results of further studies and to add this therapy to the landscape of Cushing’s,” Fleseriu said here during a presentation of the findings at AACE 2019, the annual meeting of the American Association of Clinical Endocrinologists. “We have a newer medication and still we cannot make a dent in the outcomes of Cushing’s, especially for patient-reported outcomes.”

Free testosterone levels significantly decreased in women taking levoketoconazole (a ketoconazole stereoisomer and potent steroidogenesis inhibitor), from an average of 0.32 ng/dL down to 0.12 ng/dL (0.011 to 0.004 nmol/L, P<0.0001). Men had a non-significant increase: 5.1 ng/dL up to 5.8 ng/dL (0.177 to 0.202 nmol/L).

There were no significant changes from baseline to the end of maintenance for other secondary endpoints in the analysis: moon facies, facial plethora, striae, bruising, supraclavicular fat, irregular menstruation, and dysmenorrhea. However, significant improvements after 6 months of therapy were seen in patient-reported quality of life compared with baseline (mean 10.6 change on the Cushing QOL questionnaire) as well as a significant reduction in depressive symptoms (mean -4.3 change on the Beck Depression Inventory II).

The open-label, multicenter SONICS (Study of Levoketoconazole in Cushing’s Syndrome) trial included 94 adult men and women with a confirmed diagnosis of Cushing’s syndrome and elevated 24-hour mean urinary free cortisol (mUFC) levels at least 1.5 times the upper limit of normal.

In the dose-titration phase of the study (weeks 2 to 21), patients were titrated up to a max dose of 600 mg levoketoconazole twice daily until mUFC normalization. A 6-month maintenance phase followed with no dose increases, but decreases were allowed if adverse events emerged. An additional 6-month extended evaluation phase followed thereafter.

The study met it’s previously reported primary endpoint, with 30% of patients achieving normalized mUFC levels after 6 months of maintenance therapy without a dose increase (95% CI 21%-40%, P=0.0154).

Levoketoconazole was well tolerated, with only 12.8% of patients discontinuing treatment due to adverse events. The most commonly reported adverse events were nausea (31.9%), headache (27.7%), peripheral edema (19.1%), hypertension (17%), and fatigue (16%), some of which were expected due to steroid withdrawal, Fleseriu said.

Serious adverse events were reported in 14 patients, including prolonged QTc interval in two patients, elevated liver function in one patient, and adrenal insufficiency in another, events similar to those seen with ketoconazole (Nizoral) therapy.

Fleseriu explained that drug-drug interaction is a problem in Cushing’s, as all of the available medications prolong QT interval.

She noted that in SONICS, QT prolongation with levoketoconazole was observed in few patients. It’s still a “concern,” said Fleseriu, especially for patients on other drugs that prolong QT.

Although not yet approved, levoketoconazole has received orphan drug designation from the FDA and the European Medicines Agency for endogenous Cushing’s syndrome. The tentative brand name is Recorlev.

The study was supported by Strongbridge Biopharma.

Fleseriu reported relationships with Strongbridge, Millendo Therapeutics, and Novartis. Co-authors also disclosed relevant relationships with industry.

From https://www.medpagetoday.com/meetingcoverage/aace/79465

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The Incidence Of Cushing’s Disease: A Nationwide Swedish Study

Posted on April 3, 2019 by MaryO

In: Pituitary, ISSN 1386-341X, E-ISSN 1573-7403, Vol. 22, no 2, p. 179-186Article in journal (Refereed) Published

Abstract [en]

Background: Studies on the incidence of Cushing’s disease (CD) are few and usually limited by a small number of patients. The aim of this study was to assess the annual incidence in a nationwide cohort of patients with presumed CD in Sweden.

Methods: Patients registered with a diagnostic code for Cushing’s syndrome (CS) or CD, between 1987 and 2013 were identified in the Swedish National Patient Registry. The CD diagnosis was validated by reviewing clinical, biochemical, imaging, and histopathological data.

Results: Of 1317 patients identified, 534 (41%) had confirmed CD. One-hundred-and-fifty-six (12%) patients had other forms of CS, 41 (3%) had probable but unconfirmed CD, and 334 (25%) had diagnoses unrelated to CS. The mean (95% confidence interval) annual incidence between 1987 and 2013 of confirmed CD was 1.6 (1.4-1.8) cases per million. 1987-1995, 1996-2004, and 2005-2013, the mean annual incidence was 1.5 (1.1-1.8), 1.4 (1.0-1.7) and 2.0 (1.7-2.3) cases per million, respectively. During the last time period the incidence was higher than during the first and second time periods (P<0.05).

Conclusion: The incidence of CD in Sweden (1.6 cases per million) is in agreement with most previous reports. A higher incidence between 2005 and 2013 compared to 1987-2004 was noticed. Whether this reflects a truly increased incidence of the disease, or simply an increased awareness, earlier recognition, and earlier diagnosis can, however, not be answered. This study also illustrates the importance of validation of the diagnosis of CD in epidemiological research.

Place, publisher, year, edition, pages

SPRINGER , 2019. Vol. 22, no 2, p. 179-186

Keywords [en]

Cushing’s syndrome, Epidemiology, Incidence, Validation

National Category

Endocrinology and Diabetes

Identifiers

URN: urn:nbn:se:uu:diva-380429DOI: 10.1007/s11102-019-00951-1ISI: 000461291200010PubMedID: 30799512OAI: oai:DiVA.org:uu-380429DiVA, id: diva2:1300822

From http://uu.diva-portal.org/smash/record.jsf?aq2=%5B%5B%5D%5D&c=1&af=%5B%5D&searchType=LIST_LATEST&sortOrder2=title_sort_asc&query=&language=en&pid=diva2%3A1300822&aq=%5B%5B%5D%5D&sf=all&aqe=%5B%5D&sortOrder=author_sort_asc&onlyFullText=false&noOfRows=50&dswid=-3880

 

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