What is the pituitary gland?
The pituitary gland is a small pea-sized gland that is
located at the base of the brain. It is called the master
gland because it releases 8 different types of hormones that
influence nearly every part of the body. When the pituitary
gland does not work right, it may produce either too much or
too little of one or more of the hormones.
What causes pituitary disorders?
Pituitary disorders may result from congenital and genetic
problems, injury, an impaired blood supply, infection,
radiation, or tumors.
The most common cause of pituitary disorders is pituitary
tumors. They are usually noncancerous growths of pituitary
cells.
- Pituitary tumors may make the pituitary gland produce too
much of specific hormones. These tumors are called
secretory tumors.
- A nonsecretory tumor interferes with the ability of the
normal pituitary gland to make hormones.
Any change in the normal balance of the pituitary hormones
causes problems within the body. In addition, as a tumor
mass grows, it presses against the pituitary gland or other
areas in the brain causing headaches, and vision problems.
What types of problems are caused by pituitary disorders?
Pituitary disorders cause a broad range of symptoms and can
affect:
- growth in a child
- bone and muscle mass development
- the balance of muscle and fat tissue
- reproduction functions
- water balance
- metabolism
- blood pressure
- heart function
- the immune system.
How are they diagnosed?
Blood and urine tests as well as an x-ray, CT scan, or MRI
may be used for detecting pituitary disorders. Because
pituitary disorders and tumors can cause a variety of
symptoms, people are often misdiagnosed.
How are they treated?
Treatment depends on the nature of the problem. Hormone
replacement therapy is common for replacing a low supply of
hormones. Tumors are treated by radiation therapy, drug
therapy, or surgery.
For more information, contact The Hormone Foundation at
800-HORMONE or visit their Web site at www.hormone.org, or
the Pituitary Network Association at 805-499-9973 or their
Web site at www.pituitary.org.


Disclaimer: This content is reviewed periodically and is subject to
change as new health information becomes available. The
information provided is intended to be informative and educational and is not a
replacement for professional medical evaluation, advice, diagnosis or
treatment by a healthcare professional.
HIA File DHD3918F.HTM Release 9.0/2006. Copyright © 2006 McKesson Corporation and/or one of its subdiaries. All Rights Reserved.
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