Macroprolactinoma presenting as galactorrhoea in a male

Abstract

Macroprolactinomas account for more than 50% of all functional pituitary tumours. These are equally prevalent in males and females, although they are diagnosed earlier in females. In females, the usual presentations include oligomenorrhoea, amenorrhoea, galactorrhoea and infertility, whereas males usually present with headache, sexual dysfunction and visual field defects. The following is a case of a 30-year-old male who presented with unilateral nipple discharge, sexual hypoactivity and grossly elevated serum prolactin levels. His magnetic resonance imaging revealed a macroprolactinoma. He responded well to cabergoline.