Pituitary Adenoma: The Basics

Author: OncoLink Team
Last Reviewed: July 15, 2024

The pituitary gland is found between the eyes, and just under the brain. It is made up of two parts: the anterior (front) pituitary and the posterior (back) pituitary. The two parts make different hormones. Hormones help your body work. Most pituitary adenomas are non-cancerous (benign) growths that almost always grow in the anterior part of the pituitary gland. 

Risks

The only known risk is having a genetic mutation like MEN-1, Carney complex, or FIPA.

Signs of Pituitary Adenoma

Sometimes there are no signs of pituitary adenoma. You can have changes in your eyesight or headaches. Sometimes, the signs are from too much hormone being made by the pituitary gland. 

Diagnosis of Pituitary Adenoma

When your healthcare providers think you may have a pituitary adenoma, they will do a full exam of your body and ask you questions about your health history. They may order tests like:

  • MRI.
  • CT.
  • Blood tests to check hormone levels.

Staging Pituitary Adenoma

Pituitary adenomas are not often staged but are classified as:

  • Macroadenomas (larger) or microadenomas (smaller).
  • Secreting (make hormones, also called functional) or non-secreting (do not make hormones, also called non-functional).

Treatment

Often, these treatments are used:

  • Surgery: The type depends on your cancer.
  • Radiation: The use of high energy x-rays to kill cells, is sometimes used after surgery.
  • Stereotactic Radiosurgery: The use of a large dose of radiation over one or a few days.
  • Medications: Can be used to treat adenomas that make too much of a hormone or hormones.

This article is a basic guide to pituitary adenoma. You can learn more about your type of pituitary adenoma and treatment by using the links below.

Staging and Treatment: Pituitary Adenoma

American Cancer Society. What are Pituitary Tumors? 2022.

Mayo Clinic. Pituitary Tumors. 2024.

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