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Pituitary Adenomas and Microadenomas

Dr Tormenti Scrubs SmallBy Matthew Tormenti MD, FAANS

An adenoma is a benign tumor that originates in glandular tissue.

A pituitary adenoma is a non-cancerous tumor which occurs within the pituitary gland. A microadenoma has a diameter of less than 10mm. When the diameter is greater than 10mm, the tumor is referred to as a macroadenoma.

Pituitary adenomas are surprisingly common with more than 10% of the adult population having an adenoma. Most adenomas appear spontaneously, and are not inherited from your parents. Nearly all pituitary adenomas are benign (noncancerous) and slow growing. The vast majority of pituitary adenomas cause no symptoms, and require no treatment.

The pituitary gland is extremely important as it governs most of the body’s endocrine functions. A pituitary adenoma may cause symptoms such as:

  • tiredness
  • headaches
  • vomiting
  • dizziness
  • vision problems
  • nausea
  • menstrual or breast changes
  • unexplained hair growth or loss

Where the Pituitary adenomas produce hormones, the patient normally experiences symptoms related to the over-production of hormones. Hormone producing adenomas can be causative factors in the development of Cushing’s disease, acromegaly, and hyperthyroidism.

Pituitary adenomas that do not produce hormones typically only cause problems related to the size of the tumor. For example, a large pituitary tumor can compress the pituitary gland and result in pituitary failure.

If your doctor suspects a adenoma, it may be diagnosed in a number of ways.

Tests you might receive include:

  • hormone testing
  • computed tomography (CT)
  • magnetic resonance imaging (MRI)

Other tumors may mimic the symptoms of a pituitary adenoma. We will attempt to rule out conditions such as:

Princeton Brain and Spine offers expert diagnosis and treatment of pituitary adenomas. Dr. Matthew Tormenti has advanced training in the treatment of this condition. If you are seeking treatment, please contact one of our campuses for further information.


LastUpdate: 2016-12-26 10:05:24


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