Hemangioblastoma:  It is a benign vascular tumor that is typically cystic and can occur throughout the central nervous system but found most frequently in the cerebellum, spinal cord and brainstem. Primary treatment of symptomatic hemangioblastomas is usually by surgical removal.  Von Hippel Lindau syndrome is an autosomal dominant inherited disorder characterized by both benign hemangioblastomas of the central nervous system and retina as well as renal cell carcinoma, pancreatic cysts and tumors and other neuroendocrine tumors. Learn more.