Brain Pathology Case of the Month -- April, 1996

PATIENT HISTORY

This 20 year old man presented in September, 1995 with a chief complaint of intermittent diplopia and difficulty focusing his leftward gaze during the past month. His past medical history included a tonsillectomy and adenoidectomy at age 5 years, a resection of a posterior fossa dermoid at age 10 followed by drainage of a subdural hematoma a few months later. He has been healthy since that time.
Examination revealed no abnormalities in his eye movements. Both his visual acuity and peripheral vision (by Goldman perimetry studies) were normal. The remainder of the physical exam was unremarkable. Standard serum laboratory values were normal and there was no increased prolactin.

RADIOLOGY

MICROSCOPIC

IMMUNOHISTOCHEMISTRY, SPECIAL STAINS AND OTHER STUDIES

DIAGNOSIS AND DISCUSSION

International Society of Neuropathology