Rapid size reduction of giant prolactinoma following medical treatment

A giant macroprolactinoma causing hydrocephalus was demonstrated by computed tomography in a 13-year-old boy complaining of headache and visual disturbances. Three weeks after beginning of medical treatment with dopaminergic drugs, an impressive reduction of tumor size and disappearance of hydrocephalus was noted. The patient is doing well at 5 months follow-up.