Pituitary

When It Looks Like Cushing’s But It Isn’t

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From Pituitary World News:

We are delighted to welcome Dr. Leena Shahla to the Pituitary Podcast. She is the director of The Duke Pituitary Program. Today she joins PWN co-founder and medical director of the California Center for Pituitary Disorders at UCSF, Dr. Lewis Blevins, for an in-depth discussion about pseudo-Cushing’s syndrome.

In the Duke Health web portal, Dr. Shahla says endocrinology captured her heart because it combines medical science with unique challenges. “My passion for solving puzzles drives my deep interest in pituitary disease, the most complex area of endocrinology.” You can read more about Dr. Shahla, her practice and background here.

This is a fascinating discussion about a complex, often misunderstood condition by two of the leading experts in the field you won’t want to miss it. Pseudo–Cushing’s syndrome or non-neoplastic hypercortisolism is a medical condition in which people with this disorder display the signs, symptoms, and abnormal cortisol levels.  Common causes can include  pregnancy, alcohol use disorder, morbid obesity, polycystic ovarian syndrome, end-stage renal disease, severe major depressive disorder, and poorly controlled diabetes.

Basics: Meds: Recorlev

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Cushing’s disease is a progressive pituitary disorder in which there is an excess of cortisol in the body. While the disease can be treated surgically, this option is not possible for all patients. This is one of the approved medications that assist in controlling cortisol levels in people with Cushing’s disease.

Recorlev

Recorlev was approved by the FDA in December 2021 to treat those Cushing’s patients for whom surgery is not a choice or has failed to lower cortisol levels. The medication is an oral cortisol synthesis inhibitor that prevents the adrenal glands — sitting atop the kidneys — from producing too much cortisol, thereby easing Cushing’s symptoms.

Recorlev (levoketoconazole) is a treatment that  Strongbridge Biopharma  — now  acquired  by  Xeris Pharmaceuticals  — developed for endogenous Cushing’s syndrome. Endogenous Cushing’s is a form of the disease in which symptoms occur because the body produces too much cortisol.

Abnormally high cortisol levels in Cushing’s syndrome may be primarily due to a tumor in the brain’s pituitary gland — a type of the condition called  Cushing’s disease . The first treatment option is surgery to remove those tumors. However, in some patients, this procedure is not an option or is ineffective at lowering cortisol levels.

Recorlev was  approved  by the U.S. Food and Drug Administration (FDA) in December 2021 to treat those Cushing’s patients for whom surgery is not a choice or has failed to lower cortisol levels.

How does Recorlev works?

Cortisol plays several important roles in the body, including regulating salt and sugar levels, blood pressure, inflammation, breathing, and metabolism. Too much cortisol, however, throws the body off balance, causing a wide range of symptoms, such as obesity, high blood sugar levels, bone problems, and fatigue.

Recorlev is an oral cortisol synthesis inhibitor that prevents the adrenal glands — sitting atop the kidneys — from producing too much cortisol, thereby easing Cushing’s symptoms.

Recorlev in clinical trials

Recorlev’s approval was mainly supported by data from two Phase 3 clinical trials: one called SONICS (NCT01838551) and the other LOGICS (NCT03277690).

SONICS was a multicenter, open-label, three-part trial that evaluated the safety and effectiveness of Recorlev in 94 patients with endogenous Cushing’s syndrome who were not candidates for radiation therapy or surgery, and whose cortisol levels in the urine were at least 1.5 times higher than normal.

Top-line data from SONICS revealed that nearly a third of patients saw their urinary cortisol levels drop to a normal range after six months of maintenance treatment with Recorlev, without requiring any dose increments in that period of time.

A subgroup analysis of the study also showed Recorlev helped control cortisol and blood sugar levels in patients with both Cushing’s and diabetes. The study also showed that Recorlev was able to lessen symptoms, ease depression, and improve patients’ quality of life.

LOGICS was a double-blind, randomized, withdrawal and rescue study that assessed the safety, efficacy, and pharmacological properties of Recorlev in patients with endogenous Cushing’s syndrome who had previously participated in SONICS, or who had never been treated with Recorlev.

After a period of taking Recorlev, some participants were switched to a placebo while others remained on the medication. This design allowed researchers to assess the effects of treatment withdrawal.

According to patients who stopped using Recorlev and moved to a placebo saw their urine cortisol levels rise in response to the lack of treatment, compared with those who remained on Recorlev. Additional data from the study also  showed  that patients who switched to a placebo lost Recorlev’s cholesterol-lowering benefits.

Safety data from an ongoing open-label Phase 3 extension study called OPTICS ( NCT03621280 ) also supported Recorlev’s approval. This trial, which is expected to conclude in June 2023, is designed to assess the long-term effects of Recorlev in patients who completed one or both previous studies, for up to three years.

Other details

Recorlev’s starting dose is 150 mg twice daily and should be taken orally with or without food. The maximum recommended dose is 1,200 mg per day, given as 600 mg twice daily.

The    most common side effects    associated with Recorlev include nausea, vomiting, increased blood pressure, abnormally low blood potassium levels, fatigue, headache, abdominal pain, and unusual bleeding.

Liver enzymes should be monitored before and during the treatment since this therapy can cause hepatotoxicity, or liver damage, in some individuals. For this reason, it is contraindicated in people with liver diseases such as cirrhosis. Recorlev should be immediately stopped if signs of hepatotoxicity are observed.

Recorlev also can influence heartbeat. As such, patients with certain heart conditions should be closely monitored before and during treatment.

Hypocortisolism, or lower-than-normal levels of cortisol, also may occur during treatment with Recorlev. For this reason, patients should have their cortisol levels closely monitored, and lessen or interrupt treatment if necessary.

Recorlev interacts with medicines on which certain liver enzymes act, such as CYP3A4. Treatment also is an inhibitor of P-gp, OCT2, and MATE1, which are transporters of certain medicines. The use of Recorlev with these medicines may increase the risk of adverse reactions.

Basics: Treatment – Transsphenoidal adenomectomy

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The most common procedure to remove pituitary tumors is transsphenoidal adenomectomy. It allows the removal of the tumor with minimal damage to the surrounding structures. The surgical team accesses the pituitary gland through the sphenoid sinus — a hollow space behind the nasal passages and below the pituitary gland.

If performed in specialized centers and by an experienced pituitary surgeon, this type of surgery is reported to result in an overall cure rate, or full remission, of Cushing’s disease for 80% to 90% of patients. A higher success rate is seen with smaller tumors.

However, reported remission rates vary considerably, mainly due to differences in the criteria used to define disease remission.

In some cases, a second transsphenoidal adenomectomy is required to fully remove tumor tissue; in others, the initial surgical procedure is paired with a second form of treatment, such as radiation therapy or certain medications.

Given the complexity of the procedure, the guidelines recommend patients undergo surgery in specialized Pituitary Tumor Centers of Excellence. Patients also are advised to have the surgery performed by an experienced pituitary neurosurgeon.

Follow-up for all patients should be conducted by a multidisciplinary team, including a pituitary endocrinologist.

Lifelong monitoring for disease recurrence is required.

Basics: What is Cushing’s disease?

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MaryO’Note:  I found this article very simplistic.  What do you think?

This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis or treatment. Contact a qualified medical professional before engaging in any physical activity, or making any changes to your diet, medication or lifestyle.

Imagine the heart-pounding rush of adrenaline you’d get while bungee jumping or zip lining — that’s what Angela Yawn felt all the time before receiving her diagnosis.

In a span of six years, the 49-year-old gained 52 kg (115 lbs) and suffered from joint swelling, headaches, skin redness and a racing heart.

“I would put my hand on my chest because it made me feel like that’s what I needed to do to hold my heart in,” Yawn, who lives in Griffin, U.S., told Today. “I noticed it during the day, but at night when I was trying to lie down and sleep, it was worse because I could do nothing but hear it beat, feel it thump.”

Yawn recalled being the most frustrated with the weight gain, as she’d put on 1 kg (2 lbs) a day while only eating 600 calories. “I was going crazy,” she said.

After dozens of doctors couldn’t piece together her seemingly unrelated symptoms, Yawn sought out the help of an endocrinologist in February 2021.

Blood tests and an MRI confirmed that Yawn had a tumour in her pituitary gland — a small, pea-sized organ at the base of the brain — that caused the gland to release excess adrenocorticotropic hormones. As a result, she became inundated with cortisol, a steroid the body  releases  in response to danger or stress. This combination of factors led to her diagnosis — Cushing’s disease.

Read on to learn more about Cushing’s disease, signs and symptoms as well as how it can be prevented.

What is Cushing’s disease?

“Cushing’s disease is a rare but serious condition that is caused by a pituitary tumour,” a specialist from the University of California, Los Angeles (UCLA) pituitary team tells Yahoo Canada. “The gland releases excessive adrenocorticotropic hormones and cortisol into the blood over a long period of time. It’s a hormonal disorder that is sometimes called hypercortisolism, and you will need to see an endocrinologist or someone who specializes in hormonal-related diseases to confirm your diagnosis and to help you receive proper care.”

Cushing’s disease is not the same as Cushing’s syndrome, which refers to elevated levels of cortisol in the blood and is much more common than Cushing’s disease. Unlike the disease, Cushing’s syndrome can be  caused  by taking medications that have cortisol such as prednisone, asthma inhalers and joint steroid injections.

Who is at risk for Cushing’s disease?

Cushing’s disease is incredibly rare, resulting in only 10 to 15 new cases per million people in the United States each year, according to UCLA Health.

“It’s most commonly found in people between the ages of 20 and 50, and affects about three times more women than men,” the UCLA source, who asked not to be named, says. “However, you might be more at risk if you have high blood pressure, if you’re overweight or if you have type 2 diabetes.”

What are the signs and symptoms of Cushing’s disease?

Although each person may have a unique combination of symptoms, patients typically experience changes to their physical appearance, according to Mayo Clinic.

“It’s very common to see rapid weight gain, red cheeks and bruising of the skin,” the UCLA source says. “I’ve also seen patients with generalized fatigue, depression, high blood pressure, a rapid heartbeat and loss of vision.”

“The symptoms can seem random or unrelated, which is why it can be so hard to diagnose,” they add.

To establish if you have the disease, your doctor will conduct a physical exam and ask you about your symptoms and medical history. Generally, the first step in diagnosing Cushing’s disease is determining the state of excess cortisol in the blood. Afterwards, an MRI will determine if a pituitary tumour is visible.

If you have symptoms of Cushing’s disease, you should make an appointment to see a doctor or endocrinologist.

How is Cushing’s disease treated?

In the last decade, treatment options have changed thanks to several breakthroughs in pituitary science.

“Surgery to remove the tumour is normally the first treatment option. It’s minimally invasive, has a fairly high success rate and it’s the only long-term cure for Cushing’s disease at the moment,” explains the UCLA source.

If surgery isn’t an option or doesn’t solve the problem, medication and radiation therapy are other ways to treat the disease.

“No matter the stage of the disease at the time of diagnosis, treating it requires an experienced specialist or team of doctors familiar with pituitary tumours,” the UCLA source adds.

How can I prevent Cushing’s disease?

“There’s no tried and true method of preventing the condition,” the source explains. “But if you’re at risk or if you think you have the disease, I always recommend having a doctor monitor your cortisol levels on a regular basis.”

The UCLA source also recommends implementing healthy  lifestyle  changes that can help prevent high blood pressure. Examples include reducing stress, getting adequate sleep, exercising regularly and eating a healthy  diet  that’s rich in fruits, vegetables and whole grains.

Adapted from https://ca.news.yahoo.com/what-is-cushings-disease-experts-warn-rare-serious-condition-120015725.html

Basics: Meds – Isturisa

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Cushing’s disease is a progressive pituitary disorder in which there is an excess of cortisol in the body. While the disease can be treated surgically, this option is not possible for all patients. This is one of the approved medications that assist in controlling cortisol levels in people with Cushing’s disease.

sturisa was approved in 2020 to treat adults with Cushing’s disease for whom pituitary surgery is ineffective or not an option. The oral medication works by inhibiting an enzyme called 11-beta-hydroxylase, which is involved in cortisol production.

Isturisa, also known as osilodrostat or LCI699, is an approved treatment originally developed by Novartis, but now acquired by Recordati to treat people with Cushing’s disease, a condition in which a pituitary tumor causes the body to produce excessive levels of the stress hormone cortisol.

In 2020, the U.S. Food and Drug Administration (FDA) approved Isturisa to treat adults with Cushing’s disease for whom pituitary surgery was not an option, or ineffective.

Earlier that same year, the European Commission (EC) approved Isturisa to treat people with endogenous Cushing’s syndrome. The medication also was approved for the same indication in Japan in 2021.

How does Isturisa work?

Isturisa is an oral medicine that inhibits an enzyme called 11-beta-hydroxylase, which is involved in cortisol production. Blocking the activity of this enzyme prevents excessive cortisol production, normalizing the levels of the hormone in the body and easing the symptoms of Cushing’s disease.

Isturisa in clinical trials

A Phase 2 clinical trial (NCT01331239) investigated the safety and efficacy of Isturisa as a Cushing’s disease treatment. The trial that concluded in October 2019 initially was named LINC-1, but, through a study protocol amendment, patients who completed the study could continue into a second phase called LINC-2.

The company published findings that covered both patient groups in the journal Pituitary. Data showed that Isturisa reduced cortisol levels in the urine of all patients by week 22. Urine cortisol levels reached and remained within a normal range in 79% of the patients by then. Common adverse effects included nausea, diarrhea, lack of energy, and adrenal insufficiency — a condition in which the adrenal glands are unable to produce enough hormones.

A Phase 3 clinical trial (NCT02180217) called LINC-3 also assessed the safety and efficacy of Isturisa in 137 patients with Cushing’s disease (77% female, median age 40 years). Participants were given Isturisa for 26 weeks, with efficacy-based dose adjustments during the first 12 weeks.

Then, the 71 participants with a complete response (those whose urine cortisol levels were within normal limits) at week 26 and who did not require a dose increase after week 12, were assigned randomly to either continue treatment with Isturisa or switch to a placebo.

After this 34-week period, 86% of Isturisa-treated patients had normal urinary cortisol levels, as compared to 29% of participants given placebo. All participants then were given Isturisa for an additional 12 weeks. At the end of the 48-week study, 66% of participants had normal urine cortisol levels.

Results from LINC-3 formed the basis for regulatory approvals of Isturisa. Common adverse side effects in the trial included nausea, headache, fatigue, and adrenal insufficiency.

A multi-center, randomized, double-blind, placebo-controlled Phase 3 trial (NCT02697734) called LINC-4 further confirmed the safety and efficacy of Isturisa as a Cushing’s disease therapy. During the trial, patients received Isturisa or a placebo through a 12-week period followed by treatment with Isturisa until week 48.

Top-line results showed that 77% of patients on Isturisa experienced a complete response after the 12-week randomized period, as compared to 8% of those on placebo. No new safety data were noted.

A roll-over, worldwide Phase 2 study (NCT03606408) is recruiting patients who have successfully completed any of the previous clinical trials. Patients can continue to take the dosage they received during the initial trial. The aim of this study is to assess the long-term effects of Isturisa for up to five years.

🎬 Video: Taylor Davis Spreads Awareness about Cushing’s Disease

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FLORENCE, SC (WBTW) – 21-year-old Taylor Davis, spent nearly three years battling a mysterious illness called Cushing’s Disease.

“I could barely walk to class anymore. I was in pain. I gained like 70 pounds, despite extreme dieting and exercising,” said Davis.

When Davis enrolled into her spring semester classes at USC, she started experiencing several symptoms.

“I noticed my grades started to take a fall and I was like ok something is seriously wrong here because I’ve never had trouble in school and I could stay up studying all night long and not remember anything the next day,” said Davis.

Davis went from doctor to doctor, but no one could figure out what was wrong with her.

“I thought I was going crazy. Every doctor would say keep trying to diet and exercise and we’ll get you on some medication for your depression and your anxiety,” said Davis.

After dropping out of USC and spending time in the emergency room, a Cushing’s Disease Facebook group led her to a research doctor in California.

“Around October is when the doctor officially diagnosed me and within a month I had my brain surgery scheduled,” said Davis.

Fast forward a couple months later, Davis is thankful to share her experiences on social media and help others going through the same disease.

“I post about it all the time and by using the hashtags for Cushing’s disease, I probably get three to four messages a day from people all over the world. I’ve had people message me in Spanish and I have to use google translate to try and help them,” said Davis.

From https://www.wbtw.com/news/a-woman-in-the-pee-dee-spreads-awareness-on-mysterious-disease/

🎬 Video: Pituitary tumors: Mayo Clinic Radio

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This interview originally aired July 6, 2019.  Dr. William Young Jr., a Mayo Clinic endocrinologist, discussed pituitary gland tumors.

The pituitary gland is a hormone-producing gland at the base of the brain. Sometimes known as the “master gland,” the pituitary gland produces and regulates hormones that help the body function. Pituitary tumors are abnormal growths that develop in your pituitary gland.

Some pituitary tumors result in too many of the hormones that regulate important functions of your body. Some pituitary tumors can cause your pituitary gland to produce lower levels of hormones. Most pituitary tumors are noncancerous (benign) growths that remain in your pituitary gland or surrounding tissues, and don’t spread to other parts of your body. There are various options for treating pituitary tumors, including removing the tumor, controlling its growth and managing your hormone levels with medications. Your health care provider also may recommend a wait-and-see approach.

ℹ️ Basics: Cushing’s Syndrome Overview

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Cushing’s syndrome is a rare disorder that occurs when the body is exposed to too much cortisol. Cortisol is produced by the body and is also used in corticosteroid drugs. Cushing’s syndrome can occur either because cortisol is being overproduced by the body or from the use of drugs that contain cortisol (like  prednisone ).

Cortisol is the body’s main stress hormone. Cortisol is secreted by the adrenal glands in response to the secretion of adrenocorticotropic hormone (ACTH) by the pituitary. One form of Cushing’s syndrome may be caused by an oversecretion of ACTH by the pituitary leading to an excess of cortisol.

Cortisol has several functions, including the regulation of inflammation and controlling how the body uses carbohydrates, fats, and proteins. Corticosteroids such as prednisone, which are often used to treat inflammatory conditions, mimic the effects of cortisol.

Stay tuned for more basic info…

ℹ️ Basics: Testing: Dex Tests

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Dexamethasone suppression test measures whether adrenocorticotrophic hormone (ACTH) secretion by the pituitary can be suppressed.

How the Test is Performed

During this test, you will receive dexamethasone. This is a strong man-made (synthetic) glucocorticoid medicine. Afterward, your blood is drawn so that the cortisol level in your blood can be measured.

There are two different types of dexamethasone suppression tests: low dose and high dose. Each type can either be done in an overnight (common) or standard (3-day) method (rare). There are different processes that may be used for either test. Examples of these are described below.

Common:

  • Low-dose overnight — You will get 1 milligram (mg) of dexamethasone at 11 p.m., and a health care provider will draw your blood the next morning at 8 a.m. for a cortisol measurement.
  • High-dose overnight — The provider will measure your cortisol on the morning of the test. Then you will receive 8 mg of dexamethasone at 11 p.m. Your blood is drawn the next morning at 8 a.m. for a cortisol measurement.

Rare:

  • Standard low-dose — Urine is collected over 3 days (stored in 24-hour collection containers) to measure cortisol. On day 2, you will get a low dose (0.5 mg) of dexamethasone by mouth every 6 hours for 48 hours.
  • Standard high-dose — Urine is collected over 3 days (stored in 24-hour collection containers) for measurement of cortisol. On day 2, you will receive a high dose (2 mg) of dexamethasone by mouth every 6 hours for 48 hours.

Read and follow the instructions carefully. The most common cause of an abnormal test result is when instructions are not followed.

How to Prepare for the Test

The provider may tell you to stop taking certain medicines that can affect the test, including:

  • Antibiotics
  • Anti-seizure drugs
  • Medicines that contain corticosteroids, such as hydrocortisone, prednisone
  • Estrogen
  • Oral birth control (contraceptives)
  • Water pills (diuretics)

How the Test will Feel

When the needle is inserted to draw blood, some people feel moderate pain. Others feel only a prick or stinging. Afterward, there may be some throbbing or slight bruising. This soon goes away.

Why the Test is Performed

This test is done when the provider suspects that your body is producing too much cortisol. It is done to help diagnose Cushing syndrome and identify the cause.

The low-dose test can help tell whether your body is producing too much ACTH. The high-dose test can help determine whether the problem is in the pituitary gland (Cushing disease) or from a different site in the body (ectopic).

Dexamethasone is a man-made (synthetic) steroid that binds to the same receptor as cortisol. Dexamethasone reduces ACTH release in normal people. Therefore, taking dexamethasone should reduce ACTH level and lead to a decreased cortisol level.

If your pituitary gland produces too much ACTH, you will have an abnormal response to the low-dose test. But you can have a normal response to the high-dose test.

Normal Results

Cortisol level should decrease after you receive dexamethasone.

Low dose:

  • Overnight — 8 a.m. plasma cortisol lower than 1.8 micrograms per deciliter (mcg/dL) or 50 nanomoles per liter (nmol/L)
  • Standard — Urinary free cortisol on day 3 lower than 10 micrograms per day (mcg/day) or 280 nmol/L

High dose:

  • Overnight — greater than 50% reduction in plasma cortisol
  • Standard — greater than 90% reduction in urinary free cortisol

Normal value ranges may vary slightly among different laboratories. Some labs use different measurements or may test different specimens. Talk to your doctor about the meaning of your specific test results.

What Abnormal Results Mean

An abnormal response to the low-dose test may mean that you have abnormal release of cortisol (Cushing syndrome). This could be due to:

The high-dose test can help tell a pituitary cause (Cushing disease) from other causes. An ACTH blood test may also help identify the cause of high cortisol.

Abnormal results vary based on the condition causing the problem.

Cushing syndrome caused by an adrenal tumor:

  • Low-dose test — no decrease in blood cortisol
  • ACTH level — low
  • In most cases, the high-dose test is not needed

Ectopic Cushing syndrome:

  • Low-dose test — no decrease in blood cortisol
  • ACTH level — high
  • High-dose test — no decrease in blood cortisol

Cushing syndrome caused by a pituitary tumor (Cushing disease)

  • Low-dose test — no decrease in blood cortisol
  • High-dose test — expected decrease in blood cortisol

False test results can occur due to many reasons, including different medicines, obesity, depression, and stress. False results are more common in women than men.

Most often, the dexamethasone level in the blood is measured in the morning along with the cortisol level. For the test result to be considered accurate, the dexamethasone level should be higher than 200 nanograms per deciliter (ng/dL) or 4.5 nanomoles per liter (nmol/L). Dexamethasone levels that are lower can cause a false-positive test result.

Risks

There is little risk involved with having your blood taken. Veins and arteries vary in size from one patient to another, and from one side of the body to the other. Taking blood from some people may be more difficult than from others.

Other risks associated with having blood drawn are slight, but may include:

  • Excessive bleeding
  • Fainting or feeling lightheaded
  • Multiple punctures to locate veins
  • Hematoma (blood accumulating under the skin)
  • Infection (a slight risk any time the skin is broken)

Alternative Names

DST; ACTH suppression test; Cortisol suppression test

References

Chernecky CC, Berger BJ. Dexamethasone suppression test – diagnostic. In: Chernecky CC, Berger BJ, eds. Laboratory Tests and Diagnostic Procedures. 6th ed. St Louis, MO: Elsevier Saunders; 2013:437-438.

Guber HA, Oprea M, Russell YX. Evaluation of endocrine function. In: McPherson RA, Pincus MR, eds. Henry’s Clinical Diagnosis and Management by Laboratory Methods. 24th ed. St Louis, MO: Elsevier; 2022:chap 25.

Newell-Price JDC, Auchus RJ. The adrenal cortex. In: Melmed S, Auchus RJ, Goldfine AB, Koenig RJ, Rosen CJ, eds. Williams Textbook of Endocrinology. 14th ed. Philadelphia, PA: Elsevier; 2020:chap 15.

Review Date 5/13/2021

Updated by: Brent Wisse, MD, Board Certified in Metabolism/Endocrinology, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

From https://medlineplus.gov/ency/article/003694.htm

ℹ️ Basics: The Pituitary Gland: Small But Mighty

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The pituitary gland works hard to keep you healthy, doing everything from ensuring proper bone and muscle growth to helping nursing mothers produce milk for their babies. Its functionality is even more remarkable when you consider the gland is the size of a pea.

“The pituitary is commonly referred to as the ‘master’ gland because it does so many important jobs in the body,” says Karen Frankwich, MD, a board-certified endocrinologist at Mission Hospital. “Not only does the pituitary make its own hormones, but it also triggers hormone production in other glands. The pituitary is aided in its job by the hypothalamus. This part of the brain is situated above the pituitary, and sends messages to the gland on when to release or stimulate production of necessary hormones.”

These hormones include:

  • Growth hormone, for healthy bone and muscle mass
  • Thyroid-stimulating hormone, which signals the thyroid to produce its hormones that govern metabolism and the body’s nervous system, among others
  • Follicle-stimulating and luteinizing hormones for healthy reproductive systems (including ovarian egg development in women and sperm formation in men, as well as estrogen and testosterone production)
  • Prolactin, for breast milk production in nursing mothers
  • Adrenocorticotropin (ACTH), which prompts the adrenal glands to produce the stress hormone cortisol. The proper amount of cortisol helps the body adapt to stressful situations by affecting the immune and nervous systems, blood sugar levels, blood pressure and metabolism.
  • Antidiuretic (ADH), which helps the kidneys control urine levels
  • Oxytocin, which can stimulate labor in pregnant women

The work of the pituitary gland can be affected by non-cancerous tumors called adenomas. “These tumors can affect hormone production, so you have too little or too much of a certain hormone,” Dr. Frankwich says. “Larger tumors that are more than 1 centimeter, called macroadenomas, can also put pressure on the area surrounding the gland, which can lead to vision problems and headaches. Because symptoms can vary depending on the hormone that is affected by a tumor, or sometimes there are no symptoms, adenomas can be difficult to pinpoint. General symptoms can include nausea, weight loss or gain, sluggishness or weakness, and changes in menstruation for women and sex drive for men.”

If there’s a suspected tumor, a doctor will usually run tests on a patient’s blood and urine, and possibly order a brain-imaging scan. An endocrinologist can help guide a patient on the best course of treatment, which could consist of surgery, medication, radiation therapy or careful monitoring of the tumor if it hasn’t caused major disruption.

“The pituitary gland is integral to a healthy, well-functioning body in so many ways,” Dr. Frankwich says. “It may not be a major organ you think about much, but it’s important to know how it works, and how it touches on so many aspects of your health.”

Adapted from http://www.stjhs.org/HealthCalling/2016/December/The-Pituitary-Gland-Small-but-Mighty.aspx

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