cerebellar hemangioblastoma

(ser-eh-BEH-ler hee-MAN-jee-OH-blas-TOH-muh) A benign, slow-growing tumor in the cerebellum (part of the brain at the back of the head), made up of abnormal blood vessel growth. People with von Hippel-Landau disease have an increased risk of developing hemangioblastomas.