How are prolactinomas diagnosed?

  • Blood test to identify high prolactin levels in the body
  • MRI (magnetic resonance imaging) scan of the pituitary

More About Prolactinoma and Hyperprolactinemia

Prolactinoma is the most common type of pituitary tumor. About 25% of the U.S. population have small pituitary tumors such as prolactinomas. Most of these cause no symptoms.


  • infertility in women
  • change in menstrual regularity
  • production of breast milk, even in a non-pregnant or nursing woman
  • loss of interest in sex or impotence
  • headaches
  • vision problems

Treatment of Prolactinoma

  • Medications such as bromocriptine (Parlodel) or cabergoline (Dostinex)
  • Surgery is considered only if medications are not effective or not tolerated