Fact: In the words of our dear friend and advocate, Robin Ess, “There are many genetic varieties with quite a few discovered in the past couple of years. Plus, there are several types such as adrenal, ectopic, and pituitary. And so on”….Amazingly, some doctors do not realize that there are different varieties of Cushing’s and that the symptoms can come from a different source.
For instance, a doctor might rule out a pituitary tumor and completely dismiss the patient, even with biochemical evidence of Cushing’s. That doctor, instead of dismissing the patient, should thoroughly look for other potential sources, such as an adrenal tumor, or yet another source. Did you know that tumors on one’s lungs can even cause Cushing’s? Most people don’t know that.
MaryONote: Folks might be interested in reading Jayne’s story, a Cushing’s patient who had pituitary surgeries and a bilateral adrenalectomy before finding the true source of her ectopic Cushing’s – lung tumors.
Myth: Cushing’s Syndrome/Disease can be healed or cured through change in diet or exercise.
Fact: NO! Caloric intake or lack of exercise has NO impact on weight gain and/ or loss in persons with Cushing’s.
Saying that someone “cheated” on their diet may seem reasonable to some as a reason for weight gain but I assure you that a candy bar or a piece of pie does not make a person with Cushing’s gain weight or get sick. Excess cortisol is the reason for Cushing’s symptoms. Treating the disease is the only way to alleviate symptoms.
The first line of treatment with the highest rate of remission is currently surgery to remove the tumor (s) from the pituitary, adrenal gland, or ectopic source.
Sharmyn McGraw searched for answers for seven years for whatever it was that was killing her; finally she diagnosed herself via the Internet with Cushing’s disease, caused by a pituitary brain tumor. http://www.hormone411.org
Each month, The Clinical Advisormakes one new clinical feature available ahead of print. Don’t forget to take the poll. The results will be published in the next month’s issue.
A 35-year-old woman is seen in the outpatient clinic for evaluation of an incidental pituitary macroadenoma. Her medical history is significant for hypertension, diabetes, hyperlipidemia, polycystic ovary syndrome, and obesity. She initially presented to the emergency department (ED) a week ago after an episode of right visual field changes that she described as waviness in her right eye and right hemibody sensory changes without motor deficits. While in the ED, she underwent a full workup for possible stroke, which was negative. Magnetic resonance imaging (MRI) of her brain without contrast revealed a 12-mm pituitary lesion; a repeat MRI with contrast was then ordered (Figure). No serum hormonal panel was available for review from ED records.
Figure. Magnetic resonance imaging of the case patient. Left image: sagittal view. Right image: coronal view with contrast. Credit: Melissa Wasilenko, MSN, RN
Upon further questioning of her medical history during the clinic visit, the patient notes that a few years ago she was attempting to become pregnant and was evaluated by her gynecologist for amenorrhea. At that time, she reportedly completed an endocrine laboratory workup that showed a slightly elevated prolactin level between 30 and 40 ng/mL (normal level in nonpregnant women, <30 ng/mL). Per the patient, the minimal elevation was not enough to concern the gynecologist and no MRI was ordered at that time. Her gynecologist recommended that she lose weight. Her menses returned to normal with weight loss. With a history of disrupted menstrual cycles, infertility, and patient reported elevated prolactin level, there is high suspicion for endocrine disruption. A complete pituitary panel is ordered again to examine the current hormone function considering the recent MRI findings. This revealed a prolactin of 33.7 ng/ml, and all other hormonal levels were within normal limits.
Because the patient reports multiple episodes of visual disturbances and the size of the pituitary adenoma on MRI, a neuro-ophthalmology referral is initiated for visual field testing and to determine if the pituitary macroadenoma is causing mass effect and compressing the optic nerve. The neuro-ophthalmologist found she had no visual field defect from her adenoma on visual field testing and believed that her visual disturbances were probably migraine in nature.
Discussion
Pituitary gland tumors are usually found incidentally on imaging studies obtained for other reasons or in workup of patients with abnormal endocrine hormone levels (both decreased and increased levels) or with symptoms of mass effect from the lesions.1 These tumors are typically benign in nature; cases with malignancy are extremely rare.1 The exact pathophysiology of pituitary adenomas remains unknown but is thought to be linked to heredity, hormonal influences, and genetic mutations.1
Pituitary tumors are commonly found in adults between the ages of 35 and 60 years of age.2,3 The estimated prevalence of pituitary adenomas varies widely by study and findings are typically based on autopsy and radiology data. Surveillance, Epidemiology, and End Results (SEER) Program data from 2004 to 2018 show an incidence rate of pituitary adenomas and pituitary incidentalomas of 4.28 ± 0.04 and 1.53 ± 0.02 per 100,000 population.4 Pituitary tumors have been found in 14.4% of unselected autopsy cases and 22.5% of radiology tests.1
The SEER data suggest that incidence rates are similar among women and men but are higher among women in early life and higher among males in later life.5 Rates of prolactinomas (prolactin-secreting tumors) and corticotropinomas (adrenocorticotropic hormone-secreting tumors; Cushing disease) are higher in women than men.6
Earlier SEER data showed a significantly higher incidence of pituitary adenomas in Black individuals compared with other racial/ethnic groups; several factors may account for this discrepancy such as the higher stroke rate in this population, which leads to a greater likelihood for brain imaging that detects incident pituitary tumors.5
Incidental findings of pituitary adenoma may be found during workup related to hormonal dysfunction (amenorrhea, galactorrhea, fertility disorders, sexual dysfunction), noticeable vision change, new-onset headaches, or imaging performed for other diagnostic purposes.7
Pituitary Types
Pituitary tumor types are differentiated by location, size, and functional status. Pituitary tumors commonly arise from the anterior portion of the gland (adenohypophysis) and rarely from the posterior portion (neurohypophysis).2 Both adenohypophyseal and neurohypophyseal tumors are commonly benign and slow-growing.1 Malignant pituitary tumors account for less than 1% of pituitary lesions and are usually metastases from breast and lung cancers.3 Adenohypophyseal carcinoma is rare, with less than 140 reported cases.2
Pituitary tumors are categorized by the size1,2:
Microadenomas (<10 mm)
Macroadenomas (>10 mm to 40 mm)
Giant adenomas (>40 mm)
Pituitary adenomas are further classified as functioning (hormone-secreting) or nonfunctioning (nonsecreting).1,6 If the adenoma is functioning, hormone levels will be found in excess. If the levels are within normal limits, a nonfunctioning pituitary adenoma is suspected.
Functioning Tumors
Approximately 65% of all pituitary adenomas are functioning tumors.2 Functioning pituitary adenomas present in various ways depending on which hormone is involved and the level of hormone secretion. Prolactinomas are the most common type of functioning adenomas followed by growth hormone-secreting and adrenocorticotropic hormone-secreting pituitary tumors. Adenomas secreting thyrotropin and follicle-stimulating hormone are less commonly found.2 Clinical features of functional pituitary adenomas are outlined in Table 1.2.8
Table 1. Clinical Features and Laboratory Findings of Functioning Pituitary Adenomas
Nonfunctioning Tumors
Approximately 20% to 30% of pituitary adenomas are nonfunctional.3 These tumors may go undiagnosed for years until the mass of the tumor starts to effect surrounding structures and causing secondary symptoms such as compression of the optic chiasm causing vision impairments.
Nonfunctioning pituitary adenomas and prolactinomas (functioning) are the 2 most common types of pituitary adenomas.2,3 The consulting clinician must understand the difference in pathology of these 2 types of lesions, what diagnostic test to order, how to interpret the test results, and which specialty to refer the patient to best on the initial workup findings.
Initial Workup
Proper baseline workup should be initiated before referring patients with incidental pituitary adenoma to a specialist. The initial workup includes imaging, blood work to determine if the pituitary adenoma is causing hormonal dysfunction, and neuro-ophthalmology referral for visual field testing to determine if the optic nerve/chiasm is impacted.
Imaging
The most accurate diagnostic modality of pituitary gland pathology is MRI with and without contrast. The MRI should focus on the hypothalamic-pituitary area and include contrasted imaging to evaluate the soft tissue within the intracranial structure.9 The coronal and sagittal views are the best to display the pituitary gland width and height and identify abnormalities.9 The MRI provides a detailed evaluation of the pituitary gland related to adjacent structures within the skull, which helps to detect microalterations of the pituitary gland.10 If a pituitary adenoma is an incidental finding on another imaging modality (such as a computed tomography scan or MRI without contrast), an MRI with and without contrast that focuses on the pituitary gland should be obtained.
Pituitary Laboratory Panel
A complete pituitary panel workup should be obtained including prolactin, thyrotropin, free thyroxine, cortisol (fasting), adrenocorticotropic hormone, insulinlike growth factor 1, growth hormone, follicle-stimulating hormone, luteinizing hormone, estradiol in women, and total testosterone in males.1 Tests should be completed in the morning while fasting for the most accurate results. For instance, normally cortisol levels drop during fasting unless there is abnormality. Table 2 below shows normal laboratory ranges for a complete pituitary panel.
Serum prolactin levels can slightly increase in response to changes in sleep, meals, and exercise; emotional distress; psychiatric medications; and oral estrogens. If the initial prolactin level is borderline high (21-40 ng/mL), the test should be repeated. Normal levels are higher in women than in men. Microadenomas may cause slight elevations in prolactin level (ie, <200 ng/mL), while macroadenomas are likely to cause greater elevations (ie, >200 ng/mL).1 Patients with giant prolactinomas typically present with prolactin levels ranging from 1000 ng/mL to 100,000 ng/mL.11
Perimetry
Pituitary adenomas may cause ophthalmologic manifestations ranging from impaired visual field to diplopia because of upward displacement of the optic chiasm. The optic chiasm is located above the pituitary gland and a pituitary tumor that grows superiorly can cause compression in this area.12 Optic chiasm compression from a pituitary adenoma commonly causes bitemporal hemianopsia.2 If the tumor volume is promptly reduced by surgical resection or medication (in the case of prolactinomas), initial vision changes due to compression may be reversible.12
Baseline and routine follow-up perimetry are important in patients with pituitary adenoma, as symptoms of optic chiasm compression may go unnoticed by patients as visual field deficits often develop gradually. Also, post-treatment perimetry assessments can be used to compare the initial testing to evaluate reversible visual field deficits. It is recommended that patients with pituitary adenomas (both function and nonfunctiong) receive neuro-ophthalmologic evaluations twice a year to ensure no visual changes have occurred.12
Referral to a Specialist
Management of pituitary adenomas requires a multidisciplinary team of specialists including endocrinologists, neurosurgeons, and neuro-ophthalmologists. The type of adenoma governs which specialist patients with incidental adenoma should see first.
Patients with functioning pituitary adenomas should be referred to an endocrinologist before a neurosurgeon. The most prevalent functioning adenomas, prolactinoma, are initially treated with dopamine agonist medications.1,6 A patient with prolactinoma would only need to see a neurosurgeon if they have a macroadenoma that is not responsive or only partially responsive to dopamine agonists therapy or is causing vision deficits related to compression of the optic chiasm.2
Patients with nonfunctioning pituitary adenomas should first be referred to a neurosurgeon to discuss surgical options versus observation. The recommended treatment for patients with nonfunctioning adenomas and clinical features of mass effect (ie, visual deficits) is surgery.1,6 If the patient is asymptomatic with no signs of visual field deficits, the neurosurgery team may recommend continued surveillance with serial imaging and serial perimetry screenings.12
The patient in the case was found to have a nonfunctioning pituitary adenoma (prolactin was 33.7 ng/mL). Neuro-ophthalmology did not find any visual field defect upon initial assessment; the patient decided to continue observation with serial imaging (MRI) and serial neuro-ophthalmology assessments. Serial imaging with MRI brain revealed slow but real progression of the pituitary macroadenoma (12 mm initially; 13 mm 6 months later; and 14 mm 1 year from initial MRI findings). Although the patient still did not have any visual field defects per the neuro-ophthalmology reassessments, the documented growth on MRI over a short period of time was enough to make the patient more amendable to surgical resection. The patient underwent trans-sphenoidal resection of the pituitary lesion approximately 16 months after discovery of the tumor.
Conclusion
A thorough workup including laboratory testing, imaging, and vision field testing is the foundation of an effective referral process for pituitary adenomas and guides which specialist is consulted first. If patients are referred before initial workup is completed, delays in care, unnecessary specialty visits, and increased overall health care costs may occur.
Melissa Wasilenko, MSN, RN, is a registered nurse at Lyerly Neurosurgery in Jacksonville, Florida. She is currently pursuing a doctorate in nursing practice with a focus in family medicine at the University of North Florida in Jacksonville.
Please consider joining us for #Pituitary Tumor Support Group on Saturday October 7th, 2023 at 9am to discuss Current and Emerging Medical Therapies in Pituitary Tumor Treatment by Dr. Mahalakshi Honasage, #Endocrinologist, and Dr. Jack Rock, #Neurosurgery.
First of its kind CME webinar on #CushingsDisease for #endocrinologists and other clinicians treating patients with #Cushings
Aug. 2, 2022 / PRZen / HAZLET, N.J. — In this CME Webinar, #endocrinology experts in the management of #CushingsDisease will describe best practices for the diagnosis and treatment to improve long-term outcomes for patients..
SPEAKERS:
Maria Fleseriu, MD
Professor of Medicine and Neurological Surgery
Oregon Health & Science University
Irina Bancos, MD
Associate Professor of Medicine
Mayo Clinic
Voxmedia LLC gratefully acknowledges the educational donation provided by Recordati Rare Diseases, Inc.
This educational activity is intended for #endocrinologists and other clinicians who manage patients with cushing’s disease.
Voxmedia LLC is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to provide continuing medical education for physicians.
Voxmedia LLC designates this webinar activity for a maximum of 1.00 AMA PRA Category Credit(s)™. Physicians should claim only the credit commensurate with the extent of their participation in the activity.
Nurse practitioners may participate in this educational activity and earn a certificate of completion as AANP accepts AMA PRA Category 1 Credits™ through its reciprocity agreements.
The National Commission on Certification of Physician Assistants accepts AMA PRA Category 1 Credits™ from organizations accredited by the ACCME.
For additional CME activities and online cme courses visit CMEPlanet. #endocrinologist #EndocrinePractice #Cushings #Cushing #ThinkCushings #CushingsAwarenessDay #pituitary #TheEndoSociety #ENDO2022
Over the years, we went on several Windjammer Barefoot Cruises. We liked them because they were small, casual and were fairly easy on the wallet.
They sailed around the Caribbean to a variety of islands, although they sometimes changed itineraries depending on weather, crew, whatever. One trip we were supposed to go to Saba but couldn’t make port. A lot of people got off at the next port and flew home.
The captains were prone to “Bedtime Stories” which were often more fiction than true but they added to the appeal of the trip. We didn’t care if we missed islands or not – we were just there to sail over the waves and enjoy the ride.
The last trip we took with them was about two years before I started having Cushing’s problems. (You wondered how I was going to tie this together, right?)
The cruise was uneventful, other than the usual mishaps like hitting docks, missing islands, and so on. Until it was a particularly rough sea one day. I was walking somewhere on deck and suddenly a wave came up over the deck making it very slippery. I fell and cracked the back of my head on the curved edge of a table in the dining area. I had the next-to-the-worse headache I have ever had, the worst being after my pituitary surgery. At least after the surgery, I got some morphine.
We asked several doctors later if that hit could have contributed to my Cushing’s but doctors didn’t want to get involved in that at all.
The Windjammer folks didn’t fare much better, either. In October 1998, Hurricane Mitch was responsible for the loss of the s/v Fantome (the last one we were on).
All 31 crew members aboard perished; passengers and other crew members had earlier been offloaded in Belize.
The story was recorded in the book The Ship and the Storm: Hurricane Mitch and the Loss of the Fantome by Jim Carrier. The ship, which was sailing in the center of the hurricane, experienced up to 50-foot (15 m) waves and over 100 mph (160 km/h) winds, causing the Fantome to founder off the coast of Honduras.
This event was similar to the Perfect Storm in that the weather people were more interested in watching the hurricane change directions than they were in people who were dealing with its effects.
I read this book and I was really moved by the plight of those crew members.
I’ll never know if that hit on my head contributed to my Cushing’s but I have seen several people mention on the message boards that they had a traumatic head injury of some type in their earlier lives.
We have an opportunity for you to take part in a Acromegaly and Human Growth Hormone Deficiency (GHD) Study for patients and caregivers. Our project number for this study is IQV_6382.
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Mary O’Connor (MaryO) hosted an interview with Jayne, a Cushing’s patient who had pituitary surgeries and a bilateral adrenalectomy before finding the true source of her ectopic Cushing’s.
In March of 1987, after the endo finally confirmed that I had Cushing’s, I was sent 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.
My husband asked my endo if it were his wife, if he would recommend this surgery. The endo responded that he was divorcing his wife – he didn’t care what happened to her. Oh, my!
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 night before I was admitted, I signed my will. I was sure I was going to die there. If not during testing, as a result of surgery.
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. Several were from Greece.
My first roommate was a nurse. She spent the entire first night screaming in pain. I was very glad when they moved me to a new room!
Towards the end of my testing period, I was looking forward to the surgery just to get this whole mess over with – either a cure or dying. While I was at NIH, I was gaining about a pound a day!
During the time I was home the weekend 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 reading the alumnae magazine a couple months later! She was the same class, same major, same home-town, same disease…
We have a Scottish doctor named James Lind to thank for the clinical trial. He conducted the first ever clinical trial in 1747 and developed the theory that citrus fruits cured scurvy. Lind compared the effects of various different acidic substances, ranging from vinegar to cider, on groups of afflicted sailors, and found that the group who were given oranges and lemons had largely recovered from scurvy after 6 days.
I’d like to think that I advanced the knowledge of Cushing’s at least a little bit by being a guinea pig in 1987-1989.
Several components of the National Institutes of Health (NIH) conduct and support research on Cushing’s syndrome and other disorders of the endocrine system, including the National Institute of Diabetes and Digestive and Kidney Diseases, the National Institute of Child Health and Human Development (NICHD), the National Institute of Neurological Disorders and Stroke, the National Cancer Institute, and the National Center for Research Resources.
NIH-supported scientists are conducting intensive research into the normal and abnormal function of the major endocrine glands and the many hormones of the endocrine system. Researchers continue to study the effects of excess cortisol, including its effect on brain structure and function. To refine the diagnostic process, studies are under way to assess the accuracy of existing screening tests and the effectiveness of new imaging techniques to evaluate patients with ectopic ACTH syndrome. Researchers are also investigating jugular vein sampling as a less invasive alternative to petrosal sinus sampling. Research into treatment options includes study of a new drug to treat the symptoms of Cushing’s syndrome caused by ectopic ACTH secretion.
Studies are under way to understand the causes of benign endocrine tumor formation, such as those that cause most cases of Cushing’s syndrome. In a few pituitary adenomas, specific gene defects have been identified and may provide important clues to understanding tumor formation. Endocrine factors may also play a role. Increasing evidence suggests that tumor formation is a multistep process. Understanding the basis of Cushing’s syndrome will yield new approaches to therapy.
The NIH supports research related to Cushing’s syndrome at medical centers throughout the United States. Scientists are also treating patients with Cushing’s syndrome at the NIH Clinical Center in Bethesda, MD. Physicians who are interested in referring an adult patient may contact Lynnette Nieman, M.D., at NICHD, 10 Center Drive, Room 1-3140, Bethesda, MD 20892-1109, or by phone at 301-496-8935. Physicians interested in referring a child or adolescent may contact Constantine Stratakis, M.D., D.Sc., at NICHD, 10 Center Drive, Room 1-3330, Bethesda, MD 20892-1103, or by phone at 301-402-1998.
