A<unk>  is a benign tumor (adenoma) of the pituitary gland that produces a hormone called prolactin. It is the most common type of functioning pituitary tumor. Symptoms of<unk>  are due to too much prolactin in the blood (hyperprolactinemia), or those caused by pressure of the tumor on surrounding tissues. Based on size, a<unk>  can be classified as a microprolactinoma (10 mm diameter). Prolactin stimulates the breast to produce milk and has many other functions such as regulation of mood. Hence prolactin levels are usually higher during pregnancy and after childbirth. After delivery of a baby, a mother's prolactin levels come down to normal a few weeks after breastfeeding is discontinued. Each time the milk is dispensed, prolactin levels rise; this process may cycle to maintain milk production. In males, prolactin is responsible for the sexual refractory period after orgasm and excess levels can lead to erectile dysfunction.
Prolactinoma
Hyperprolactinemic SAHA syndrome
Pituitary adenoma
Leydig cell tumour
Gonadotropin-resistant ovary syndrome
Granulosa cell tumour
Sertoli cell tumour
Gonadoblastoma