Can A Pituitary Tumor Affect Menstrual Cycle?

Can A Pituitary Tumor Affect Menstrual Cycle? Overproduction of prolactin from a pituitary tumor (prolactinoma) can cause a decrease in normal levels of sex hormones — estrogen in women and testosterone in men. Excessive prolactin in the blood affects men and women differently. In women, prolactinoma might cause: Irregular menstrual periods. Can a pituitary tumor