A surgical series of 59 patients with cerebellar or spinal cord hemangioblastomas or von Hippel-Lindau's (VHL) syndrome is analyzed. The presence of the tumor is easily detected by Computerized Tomography (CT) and Nuclear Magnetic Resonance (NMR), but angiography is still necessary for a correct surgical planning. The value of a sharp distinction among patients with single hemangioblastomas and the ones with Lindau's disease and VHL syndrome is stressed. In fact patients with single cerebellar or spinal hemangioblastomas have a good prognosis, while patients with disseminated hemangioblastomas have a rather poor outlook. Neuropathological studies with immunohistochemical techniques have been performed to identify the nature of the stromal cells of the hemangioblastomas: their origin from glial, endothelial and monociticphagocitic elements seems excluded.
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