Imaging Technique Measures Tumor Stiffness to Aid Surgical Planning

Posted on January 28, 2026 by MaryO

screenshot-2017-01-27-11-04-44

 

Important steps in planning tumor surgery include identifying borders between tumor and healthy tissue and assessing the tumor stiffness, e.g. hard and calcified or soft and pliant. For decades, tumors near the surface of the body have been evaluated for stiffness by simple palpation—the physician pressing on the tissue. Because tumors within the skull cannot be palpated, researchers used Magnetic Resonance Elastography (MRE) to assess pituitary tumor stiffness by measuring waves transmitted through the skull into pituitary macroadenomas (PMAs). MRE reliably identified tumors that were soft enough for removal with a minimally-invasive suction technique versus harder tumors requiring more invasive surgery.

“The group developed brain MRE several years ago and is now successfully applying it to clinical diagnosis and treatment,” explained Guoying Liu, Ph.D., Director of the NIBIB Program in Magnetic Resonance Imaging. “This development of a new imaging technique followed by its practical application in surgical planning for better patient outcomes is an outstanding example of one of the main objectives of NIBIB-funded research.”

MRE is a special magnetic resonance imaging technique that captures snapshots of shear waves that move through the tissue and create elastograms—images that show tissue stiffness. John Huston III, M.D., Professor of Radiology at the Mayo Clinic in Rochester, MN, and senior author of the study, explains how MRE works. “MRE is similar to a drop of water hitting a still pond to create the ripples that move out in all directions. We generate tiny, harmless ripples, or shear waves, that travel through the brain of the patient. Our instruments measure how the ripples change as they move through the brain and those changes give us an extremely accurate measure–and a color-coded picture–of the stiffness of the tissue.”

MRE data enables non-invasive surgical planning

Ninety percent of PMAs are soft—nearly the consistency of toothpaste. Therefore, without MRE, surgeons would routinely plan for a procedure called transphenoidal resection that employs very thin instruments that are threaded through the nasal cavity to the pituitary gland at the base of the skull, where suction is used to remove the tumor. However, in about 10% of the cases, the surgeon will encounter a hard tumor. At that point an attempt is made to break-up the tumor—essentially chipping away at it with sharp instruments. If that is not successful, the surgeon must perform a fully-invasive craniotomy that involves removing a piece of the skull bone in order to fully expose the tumor.

The more extensive procedure means added risk and discomfort for patients, and up to a week-long recovery in the hospital compared to the transphenoidal approach that allows patients to leave the hospital in a day or two. Using MRE, hard PMAs can be identified and the more extensive craniotomy can be planned before starting the surgery, which makes the more invasive procedure less taxing for both the surgeon and patient. Similarly, MRE showing a soft PMA gives surgeons confidence that the nasal entry and removal by suction will be successful-eliminating the likelihood that the surgeon may need to perform a second fully-invasive craniotomy.

In the study of PMA reported in the January 2016 issue of the journal Pituitary, the group performed pre-surgical MRE evaluation of the PMAs of 10 patients.The MRE measurements were compared to tumor classifications made by inspection of the tumor during surgery. The surgeons categorized six tumors as soft and four tumors as medium. No tumors were deemed to be hard. The comparison of the MRE results and reports of stiffness by the surgeons when the tumor was removed and inspected were in close agreement, which was confirmed by statistical analysis.

Future plans

Although brain MRE is not yet widely available, Huston explained that the surgeons at the Mayo Clinic are now routinely using MRE to plan the best procedure for the removal of PMAs as well as several other types of brain tumor. And, even though this study of the 10 PMA patients is a very small set, Huston believes that as Mayo surgeons continue to use MRE in planning, the technique will likely begin to be adopted by other surgical centers.

Huston explained that an important aspect of some of the other brain tumor types, which the surgeons are finding extremely useful, is the ability of MRE to identify tumor adhesion to the brain. Adhesion refers to whether the brain tumor and healthy brain tissue are connected by an extensive network of blood vessels and connective tissue. This is in comparison with a tumor that is in the brain but is isolated from healthy tissue.

When MRE is used to analyze this aspect of the tumor, it clearly identifies those that are non-adhered, showing a border around the tumor through which there are no vascular connections. Conversely, MRE of adhered tumors show no border between the tumor and healthy brain, indicating extensive vascular and soft tissue connections between brain and tumor. Mutual blood vessels make removal of adherent tumors much more difficult, with a much higher chance of damage to healthy tissue and potential loss of function for the patient.

Huston and his colleagues are continuing to apply MRE, often called “palpating by imaging” to diagnosis of other brain disorders. In addition to characterizing focal brain disorders such as tumors, the group is testing the potential for MRE to provide diagnostic information about diffuse brain disease, and are currently using MRE brain stiffness patterns to identify different types of neural disorders including dementia.

This research was funded by the National Institutes of Health through the National Institute of Biomedical Imaging and Bioengineering grant EB001981.

Magnetic resonance elastography detects tumoral consistency in pituitary macroadenomas. Hughes JD, Fattahi N, Van Gompel J, Arani A, Ehman R, Huston J 3rd. Pituitary. 2016 Jun;19(3):286-92

From http://www.rdmag.com/news/2017/01/imaging-technique-measures-tumor-stiffness-aid-surgical-planning

Filed under: Cushing's, Diagnostic Testing, pituitary, Treatments | Tagged: , , , , , , | 2 Comments »

Late-night salivary cortisol often fluctuates widely in Cushing’s disease

Posted on January 18, 2026 by MaryO

Among patients with new, persistent or recurrent Cushing’s disease, researchers observed cortisol levels that fluctuated widely over 6 months, with measurements falling into the normal range more than 50% of the time for a few patients, according to findings from a prospective study.

“Cortisol levels, as represented by late-night salivary cortisol, in Cushing’s disease patients without variable symptoms fluctuate much more widely than many endocrinologists may realize,” Laurence Kennedy, MD, FRCP, chairman of the department of endocrinology, diabetes and metabolism at the Cleveland Clinic, told Endocrine Today. “In patients with recurrent or persistent Cushing’s disease, the late-night salivary cortisol can be normal much more frequently than has been appreciated.”

Kennedy and colleagues analyzed late-night salivary samples (between 11 p.m. and midnight) from 16 patients with confirmed Cushing’s disease for up to 42 consecutive nights between January and June 2014 (age range, 27-62 years). Researchers defined normal late-night salivary cortisol as between 29 ng/dL and 101 ng/dL.

Within the cohort, eight patients had a new diagnosis of Cushing’s disease and underwent transsphenoidal surgery; eight patients had recurrent or persistent Cushing’s disease.

Researchers observed at least three peaks and two troughs in 12 of the 16 patients, and late-night salivary cortisol levels were in the normal range on at least one occasion in 14 patients (all patients with recurrent/persistent disease and six of eight patients with new disease). Only two of the 16 patients exhibited fluctuations that were deemed cyclical, according to researchers, with the interval between peaks approximately 4 days, they noted.

In five of the eight patients with recurrent or persistent disease, the lowest late-night salivary cortisol measurement was at or below the limit of detection on the assay and approximately 1 in 3 measurements were in the normal range, researchers found. Four patients had normal measurements more than 50% of the time.

Additionally, six of the patients with recurrent or persistent disease had measurements in the normal range on two consecutive nights on at least one occasion, two patients had six such measurements in a row, and one had 31 consecutive normal levels, according to researchers.

In six patients with newly diagnosed Cushing’s disease with at least one normal late-night salivary cortisol measurement, the maximum levels ranged from 1.55 to 15.5 times the upper limit of normal.

“First, widely fluctuant cortisol levels in patients with Cushing disease do not appear to be associated with fluctuating symptoms, at least in our patient population,” Kennedy said. “Second, you need to be careful drawing conclusions on the efficacy of potential medical treatments for Cushing’s disease based on only one or two late-night salivary cortisol levels, given the extreme variation that occurs in the untreated patient. Third, diagnosing recurrent or persistent Cushing’s disease can be challenging at the best of times, and, though it is felt that late-night salivary cortisol may be the best test for early diagnosis, it may require more than the suggested two, three or four tests on successive nights to make the diagnosis.”

Kennedy said better tests for diagnosing Cushing’s disease are needed, adding that investigating the potential utility of salivary cortisone could be useful. – by Regina Schaffer

For more information:

Lawrence Kennedy, MD, can be reached at Cleveland Clinic, Department of Endocrinology, Diabetes and Metabolism, 9500 Euclid Ave., Cleveland, OH 44195; email: kennedl4@ccf.org.

Disclosures: The authors report no relevant financial disclosures.

From https://www.healio.com/endocrinology/adrenal/news/in-the-journals/%7Bf9721377-6a2a-401c-a16d-2d4624233b63%7D/late-night-salivary-cortisol-often-fluctuates-widely-in-cushings-disease

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

Skeletal Maturation in Children With Cushing’s Syndrome is Not Consistently Delayed

Posted on January 13, 2026 by MaryO

Skeletal maturation in children with cushing syndrome is not consistently delayed: The role of corticotropin, obesity, and steroid hormones, and the effect of surgical cure.

J Pediatr. 2014 Jan 9. pii: S0022-3476(13)01500-X. doi: 10.1016/j.jpeds.2013.11.065. [Epub ahead of print]

The Journal of Pediatrics, 01/22/2014 Clinical Article

Lodish MB, et al. – The aim of this study is to assess skeletal maturity by measuring bone age (BA) in children with Cushing syndrome (CS) before and 1–year after transsphenoidal surgery or adrenalectomy, and to correlate BA with hormone levels and other measurements. Contrary to common belief, endogenous CS in children appears to be associated with normal or even advanced skeletal maturation. When present, BA advancement in CS is related to obesity, insulin resistance, and elevated adrenal androgen levels and aromatization. This finding may have significant implications for treatment decisions and final height predictions in these children.

Methods

  • This case series conducted at the National Institutes of Health Clinical Center included 93 children with Cushing disease (CD) (43 females; mean age, 12.3 ± 2.9 years) and 31 children with adrenocorticotropic hormone–independent CS (AICS) (22 females, mean age 10.3 ± 4.5 years).
  • BA was obtained before surgery and at follow-up.
  • Outcome measures were comparison of BA in CD vs AICS and analysis of the effects of hypercortisolism, insulin excess, body mass index, and androgen excess on BA.

Results

  • Twenty-six of the 124 children (21.0%) had advanced BA, compared with the expected general population prevalence of 2.5% (P < .0001). Only 4 of 124 (3.2%) had delayed BA.
  • The majority of children (76%) had normal BA.
  • The average BA z-score was similar in the children with CD and those with AICS (0.6 ± 1.4 vs 0.5 ± 1.8; P = .8865).
  • Body mass index SDS and normalized values of dehydroepiandrosterone, dehydroepiandrosterone sulfate, androsteonedione, estradiol, and testosterone were all significantly higher in the children with advanced BA vs those with normal or delayed BA.
  • Fifty-nine children who remained in remission from CD had follow-up BA 1.2 ± 0.3 years after transsphenoidal surgery, demonstrating decreased BA z-score (1.0 ± 1.6 vs 0.3 ± 1.4; P < .0001).

From http://www.ncbi.nlm.nih.gov/pubmed/24412141

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Long-Term Obesity Persists Despite Pituitary Adenoma Treatment In Childhood

Posted on January 9, 2026 by MaryO

Sethi A, et al. Clin Endocrinol. 2019;doi:10.1111/CEN.14146.

January 5, 2020

Obesity is common at diagnosis of pituitary adenoma in childhood and may persist despite successful treatment, according to findings published in Clinical Endocrinology.

“The importance of childhood and adolescent obesity on noncommunicable disease in adult life is well recognized, and in this new cohort of patients, we report that obesity is common at presentation of pituitary adenoma in childhood and that successful treatment is not necessarily associated with weight loss,” Aashish Sethi, MD, MBBS, a pediatric endocrinologist in the department of endocrinology at Alder Hey Children’s Hospital in Liverpool, United Kingdom, and colleagues wrote. “We have reported obesity, and obesity-related morbidity in a mixed cohort of children and young adults previously, but [to] our knowledge, this is the first time this observation has been reported in a purely pediatric cohort.”

In a retrospective study, Sethi and colleagues analyzed clinical and radiological data from 24 white children from Alder Hey Children’s Hospital followed for a median of 3.3 years between 2000 and 2019 (17 girls; mean age at diagnosis, 15 years). Researchers assessed treatment modality (medical, surgical or radiation therapy), pituitary hormone deficiencies and BMI, as well as results of any genetic testing.

Within the cohort, 13 girls had prolactinomas (mean age, 15 years), including 10 macroadenomas between 11 mm and 35 mm in size. Children presented with menstrual disorders (91%), headache (46%), galactorrhea (46%) and obesity (38%). Nine children were treated with cabergoline alone, three also required surgery, and two were treated with the dopamine agonist cabergoline, surgery and radiotherapy.

Five children had Cushing’s disease (mean age, 14 years; two girls), including one macroadenoma. Those with Cushing’s disease presented with obesity (100%), short stature (60%) and headache (40%). Transsphenoidal resection resulted in biochemical cure; however, two patients experienced relapse 3 and 6 years after surgery, respectively, requiring radiotherapy. One patient also required bilateral adrenalectomy.

Six children had a nonfunctioning pituitary adenoma (mean age, 16 years; two girls), including two macroadenomas. These children presented with obesity (67%), visual field defects (50%) and headache (50%). Four required surgical resections, with two experiencing disease recurrence after surgery and requiring radiotherapy.

During the most recent follow-up exam, 13 children (54.1%) had obesity, including 11 who had obesity at diagnosis.

“The persistence of obesity following successful treatment, in patients with normal pituitary function, suggests that mechanisms other than pituitary hormone excess or deficiency may be important,” the researchers wrote. “It further signifies that obesity should be a part of active management in cases of pituitary adenoma from diagnosis.” – by Regina Schaffer

Disclosures: The authors report no relevant financial disclosures.

From https://www.healio.com/endocrinology/adrenal/news/online/%7Bde3fd83b-e8e0-4bea-a6c2-99eb896356ab%7D/long-term-obesity-persists-despite-pituitary-adenoma-treatment-in-childhood

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

On Becoming Empowered

Posted on January 1, 2026 by MaryO

This is kind of a “cheat” post since it’s a compilation of other posts, web pages, message board posts and some original thoughts.  

For all of my early life, I was the good, compliant, patient.  I took whatever pills the doctor prescribed, did whatever tests h/she (most always a he) wrote for.  Believed that whatever he said was the absolute truth.  He had been to med school.  He knew what was wrong with me even though he didn’t live in my body 24/7 and experience what I did.

I know a lot of people are still like this.  Their doctor is like a god to them.  He can do no wrong – even if they don’t feel any better after treatment, even if they feel worse.  “But the doctor said…”

Anyway, I digress.

All this changed for me in 1983.

At first I noticed I’d stopped having my periods and, of course, I thought I was pregnant. I went to my Gynecologist who had no explanation. Lots of women lose their periods for a variety of reasons so no one thought that this was really significant.

Then I got really tired, overly tired. I would take my son to a half hour Choir rehearsal and could not stay awake for the whole time. I would lie down in the back of the van, set an alarm and sleep for the 30 minutes.

A whole raft of other symptoms started appearing – I grew a beard (Hirsuitism), gained weight even though I was on Weight Watchers and working out at the gym nearly every day, lost my period, everything hurt, got what is called a “moon face” and a “buffalo hump” on the back of my neck. I also got stretch marks. I was very depressed but it’s hard to say if that was because of the hormone imbalance or because I felt so bad and no one would listen to me.

I came across a little article in the Ladies Home Journal magazine which said “If you have these symptoms…ask your doctor about Cushing’s”. After that, I started reading everything I could on Cushing’s and asking my doctors. Due to all my reading at the library and medical books I bought, I was sure I had Cushing’s but no one would believe me. Doctors would say that Cushing’s Disease is too rare, that I was making this up and that I couldn’t have it.

I asked doctors for three years – PCP, gynecologist, neurologist, podiatrist – all said the now-famous refrain.  It’s too rare.  You couldn’t have Cushing’s.  I kept persisting in my reading, making copies of library texts even when I didn’t understand them, keeping notes.  I just knew that someone, somewhere would “discover” that I had Cushing’s.

My husband was on the doctors’ sides.  He was sure it was all in my mind (as opposed to all in my head!) and he told me to just think “happy thoughts” and it would all go away.

A Neurologist gave me Xanax. Since he couldn’t see my tumor with his Magnetic Resonance Imaging (MRI) machine there was “no possibility” that it existed. Boy was he wrong!

Later in 1986 I started bruising incredibly easily. I could touch my skin and get a bruise. On New Year’s Day of 1987 I started bleeding under the skin. My husband made circles around the outside perimeter each hour with a marker, like the rings of a tree. When I went to my Internist the next day he was shocked at the size. He now thought I had a blood disorder so he sent me to a Hematologist/Oncologist.

Fortunately, the Hematologist/Oncologist ran a twenty-four hour urine test and really looked at me. Both he and his partner recognized that I had Cushing’s. Of course, he was sure that he did the diagnosis.  No matter that I had been pursuing this with other doctors for 3 years.

It was not yet determined if it was Cushing’s Disease (Pituitary) or Syndrome (Adrenal). However, he couldn’t help me any further so the Hematologist referred me to an Endocrinologist.

The Endocrinologist, of course, didn’t trust the other tests I had had done so I was back to square one. He ran his own multitude of tests. He had to draw blood at certain times like 9 AM. and 5 PM. There was a dexamethasone suppression test where I took a pill at 10 p.m. and gave blood at 9 am the next day. I collected gallons of urine in BIG boxes (Fun in the fridge!). Those were from 6 a.m. to 6 a.m. to be delivered to his office by 9 a.m. same day. I was always worried that I’d be stopped in rush hour and the police would ask about what was in that big container. I think I did those for a week. He also did standard neurological tests and asked lots of questions.

When the endo confirmed that I had Cushing’s in 1987 he sent me to a local hospital where they repeated all those same tests for another week and decided that it was not my adrenal gland (Cushing’s Syndrome) creating the problem. The doctors and nurses had no idea what to do with me, so they put me on the brain cancer ward.

When I left this hospital after a week, we didn’t know any more than we had before.

As luck would have it, NIH (National Institutes of Health, Bethesda, Maryland) was doing a clinical trial of Cushing’s. I live in the same area as NIH so it was not too inconvenient but very scary at first to think of being tested there. At that time I only had a choice of NIH, Mayo Clinic and a place in Quebec to do this then-rare pituitary surgery called a Transsphenoidal Resection. I chose NIH – closest and free. After I was interviewed by the Doctors there, I got a letter that I had been accepted into the clinical trial. The first time I was there was for 6 weeks as an inpatient. More of the same tests.

There were about 12 of us there and it was nice not to be alone with this mystery disease. Many of these Cushies (mostly women) were getting bald, couldn’t walk, having strokes, had diabetes. One was blind, one had a heart attack while I was there. Towards the end of my testing period, I was looking forward to the surgery just to get this whole mess over with. While I was at NIH, I was gaining about a pound a day!

The MRI still showed nothing, so they did a Petrosal Sinus Sampling Test. That scared me more than the prospect of surgery. (This test carries the risk of stroke and uncontrollable bleeding from the incision points.) Catheters were fed from my groin area to my pituitary gland and dye was injected. I could watch the whole procedure on monitors. I could not move during this test or for several hours afterwards to prevent uncontrolable bleeding from a major artery. The test did show where the tumor probably was located. Also done were more sophisticated dexamethasone suppression tests where drugs were administered by IV and blood was drawn every hour (they put a heplock in my arm so they don’t have to keep sticking me). I got to go home for a weekend and then went back for the surgery – the Transsphenoidal Resection. I fully expected to die during surgery (and didn’t care if I did) so I signed my will and wrote last letters to those I wanted to say goodbye to. During the time I was home just before surgery, a college classmate of mine (I didn’t know her) did die at NIH of a Cushing’s-related problem. I’m so glad I didn’t find out until a couple months later!

November 3, 1987, the surgeon, Dr. Ed Oldfield, cut the gum above my front teeth under my upper lip so there is no scar. He used tiny tools and microscopes. My tumor was removed successfully. In some cases (not mine) the surgeon uses a plug of fat from the abdomen to help seal the cut. Afterwards, I was in intensive care overnight and went to a neurology ward for a few days until I could walk without being dizzy. I had some major headaches for a day or two but they gave me drugs (morphine) for those. Also, I had cotton plugs in my nostrils. It was a big day when they came out. I had diabetes insipidus (DI) for a little while, but that went away by itself – thank goodness!

I had to use a foam product called “Toothies” to brush my teeth without hitting the incision. Before they let me go home, I had to learn to give myself an injection in my thigh. They sent me home with a supply of injectible cortisone in case my level ever fell too low (it didn’t). I was weaned gradually off cortisone pills (scary). I now take no medications. I had to get a Medic Alert bracelet. I will always need to tell medical staff when I have any kind of procedure – the effects of my excess cortisone will remain forever.

I went back to the NIH for several follow-up visits of a week each where they did all the blood and urine testing again. After a few years NIH set me free. Now I go to my “outside” endocrinologist every year for the dexamethasone suppression test, 24-hour urine and regular blood testing.

As I get further away from my surgery, I have less and less chance that my tumor will grow back. I have never lost all the weight I gained and I still have the hair on my chin but most of my other symptoms are gone. I am still and always tired and need a nap most days. I do not, however, still need to take whole days off just to sleep.

I consider myself very lucky that I was treated before I got as bad as some of the others on my floor at NIH but think it is crazy that these symptoms are not taken seriously by doctors.

My story goes on and if you’re interested some is on this blog and some is here:

Forbes Magazine | MaryO’s bio | Cushing’s and Cancer Blog | Cushing’s Awareness Day Testimonial Archive |

Because of this experience in getting a Cushing’s diagnosis – and later, a prescription for growth hormone – I was concerned that there were probably other people not being diagnosed with Cushing’s. When I searched online for Cushing’s, all the sites that came up were for dogs and horses with Cushing’s.  Not what I was looking for!

In July of 2000, I was talking with my dear friend Alice, who ran a wonderful menopause site, Power Surge, wondering why there weren’t many support groups online (OR off!) for Cushing’s.  This thought percolated through my mind for a few hours and I realized that maybe this was my calling.  Maybe I should be the one to start a network of support for other “Cushies” to help them empower themselves.

I wanted to educate others about the awful disease that took doctors years of my life to diagnose and treat – even after I gave them the information to diagnose me.  I didn’t want anyone else to suffer for years like I did.  I wanted doctors to pay more attention to Cushing’s disease.

The first website (http://www.cushings-help.com) went “live” July 21, 2000.  It was just a single page of information. The message boards began September 30, 2000 with a simple message board which then led to a larger one, and a larger.  Today, in 2010, we have over 7 thousand members.  Some “rare disease”!

The message boards are stillactive and we have weekly online text chats, weekly live interviews, local meetings, conferences, email newsletters, a clothing exchange, a Cushing’s Awareness Day Forum, podcasts, phone support and much more. Because I wanted to spread the word to others not on “the boards” we have extended out to social networking sites – twitter groups, facebook groups, twines, friendfeeds, newsletters, websites, chat groups, multiply.com, and much, much more.

People are becoming more empowered and participating in their own diagnoses, testing and treatment.  This have changed a lot since 1983!

When I had my Cushing’s over 40 years ago (AARRGGHH!), I never thought that I would meet another Cushing’s patient in real life or online. Back then, I’d never even been aware that there was anything like an “online”. I’m so glad that people struggling with Cushing’s today don’t have to suffer anymore thinking that they’re the only one who deals with this.

Because of my work on the websites – and, believe me it is a ton of work! – I have had the honor of meeting over a hundred other Cushies personally at local meetings, conferences, at NIH (the National Institutes of Health in Bethesda, MD where I had my final diagnosis and surgery). It occurred to me once that this is probably more than most endocrinologists will ever see in their entire career. I’ve also talked to countless others on the phone. Amazing for a “rare” disease!

I don’t know what pushed me in 1983, how I got the confidence and self-empowerment to challenge these doctors and their non-diagnoses over the years.  I’m glad that I didn’t suffer any longer than I did and I’m glad that I have a role in helping others to find the medical help that they need.

What do *YOU* think?  How are you becoming empowered?

Filed under: Clinical trials, Cushing's, General Health, Health Care, pituitary | Tagged: , , , , , , , , , , , , , , , , , , , | 1 Comment »

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