• A 32-year-old man with a history of delayed puberty and obesity was seen initially with bitemporal hemianopsia and headache in 1974. Neuroradiologic studies showed a mass in the chiasmatic cistern and hypothalamus. Surgical exploration of the chiasm was unrevealing. Slowly progressive memory loss and intellectual impairment developed. Necropsy in 1978 disclosed a large cavernous hemangioma in the diencephalon.