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.
( SAYR-eh-BEH-ler hee-MAN-jee-oh-blas-TOH-muh )
Source: NCI Dictionary of Cancer Terms
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