Prolactinoma: A pituitary tumor which causes breast milk production due to the hormone prolactin and other symptoms similar to menopause in women. Men with prolactinomas typically have headaches or lose their peripheral vision. About two-thirds of men lose their interest in sex and become impotent. The tumor is benign (non-cancerous) over 99% of the time. It is the most common of all pituitary tumors (28%). The cause of the tumor is unknown.
High prolactin levels can cause women to have irregular or absent periods, infertility, or abnormal breast milk production. In men, high prolactin levels cause low testosterone which leads to fatigue, decreased muscle strength, low libido, erectile dysfuntion, and infertility.
Symptoms of prolactinoma
- Reduction in sex drive (libido)
- Pain during intercourse; vaginal dryness
- Visual field disturbances
- Unexplained weight gain
- Mood changes
- Male hypogonadism
- Milk discharge from nipples
- Headaches
- Changes in or loss of menstrual cycle
- Infertility
- Fractures from osteoporosis
- Delayed puberty
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