Choriocarcinoma of the septum pellucidum: case report.

A case of choriocarcinoma of the septum pellucidum is presented. The patient, a 6-year-old boy, demonstrated high levels of human chorionic gonadotropin in his urine, serum, and cerebrospinal fluid, and precocious puberty. The physical conditions and laboratory data returned to normal after surgical removal of the tumor, whole brain irradiation, and chemotherapy. Currently, there is no evidence of recurrence at 5 months after surgery.