How is a prolactinoma diagnosed?
Elevations of the prolactin hormone in the body are detected by a blood test. Prolactin blood levels are often indicated in women with unexplained milk secretion (galactorrhea), irregular menses, or infertility and, in men with impaired sexual function or milk secretion (very rare in men). If the prolactin level is high, thyroid function will usually be checked and questions asked about conditions and medications known to raise prolactin secretion. Magnetic resonance imaging (MRI) is the most sensitive test for detecting and measuring prolactinomas. MRI scans may be repeated periodically to assess tumor progression and the effects of therapy. Computer tomography (CT scan) also provides an image of the pituitary, but it is less sensitive than the MRI for detection of a prolactinoma. In addition to assessing the size of the pituitary tumor on the MRI, doctors also look for damage to surrounding tissues. What follow-up tests are done after a prolactinoma diagnosis? When a prolactinoma is
