A prolactinoma is a prolactin-producing tumour of the pituitary gland.

These tumours come in various sizes, but the vast majority are less than 10mm in diameter. These are called microprolactinomas. The rarer large tumours are called macroprolactinomas. Prolactinomas can occur in both men and women.

Very few patients with prolactinomas require surgery, as most prolactinomas (particularly microprolactinomas) shrink in size following treatment with medication.

Typical Symptoms

  • discharge from breasts (Galactorrhoea) - females
  • irregular periods (Oligomenorrhoea) or loss of normal menstrual function (Amenorrhoea) - adult females
  • impotence - adult males
  • reduced fertility
  • decrease in sex drive
  • headaches
  • vision disturbance