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Your pituitary gland is located on the underside of your brain. It releases eight hormones. Each of these hormones plays its own role in the function of your body. Functions range from stimulating bone growth to prompting your thyroid gland to release hormones that control your metabolism.
Hormones produced by the pituitary gland include:
Sometimes, your pituitary gland does not release enough of one or more of these hormones. This is called hypopituitarism.
Your pituitary gland may stop producing enough of one or more of its hormones if it has suffered trauma. For example, if you have had brain surgery, a brain infection, or a head injury, your pituitary gland may be affected.
Certain tumors can also affect the function of this gland. These include:
Other possible causes of hypopituitarism include:
Sometimes, doctors can’t figure out what caused a particular case of hypopituitarism.
The symptoms of hypopituitarism depend on which hormones your pituitary gland is not producing enough of. For example, if the pituitary does not produce enough growth hormone in a child, they may have a permanently short stature. Alternately, if it doesn’t produce enough follicle-stimulating hormone or luteinizing hormone, it might cause problems with sexual function, menstruation, and fertility.
If your doctor thinks you may have hypopituitarism, they will use a blood test to check your levels of the hormones produced by the pituitary gland. Sometimes, they will also check for hormones that your pituitary gland stimulates other glands to release.
For example, your doctor may check your T4 levels. Your pituitary gland doesn’t produce this hormone. However, it releases TSH, which stimulates your thyroid gland to release T4. Therefore, having low levels of T4 indicates that you may have a problem with your pituitary gland.
Your doctor may prescribe specific medications before doing blood tests. These medications are designed to stimulate your body’s production of specific hormones. Taking these before the test can help your doctor get a better understanding of your pituitary gland function.
Once your doctor has determined which hormone levels are low, they must check the parts of your body (target organs) affected by those hormones. Sometimes, the problem isn’t with your pituitary gland itself, but rather with these other target organs.
Your doctor may also perform imaging tests, such as a CT scan or MRI scan on your brain. These tests can help them figure out if a tumor on your pituitary gland is affecting its function.
This condition is best managed by an endocrinologist. There is no single course of treatment for this condition because a number of hormones may be affected. In general, the goal of treatment is to bring all your hormone levels back to normal.
This may involve taking medications to replace the hormones your pituitary gland is not producing properly. In this case, your hormone levels will need to be checked regularly. This allows your doctor to adjust the doses of medications you are taking to make sure you’re getting the amount you need.
If your pituitary problems are caused by a tumor, surgery to remove the tumor may restore your hormone production to normal. In some cases, eliminating a tumor will also involve radiation therapy.
Written by: Gretchen Holm
Published on: Jul 23, 2012on: Jul 26, 2017
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