Hemangioblastoma of the cerebellum--an immunocytochemical study.

Immunocytochemical studies using a new antibody against endothelial cells and commercially available antibodies against glial fibrillary acidic protein (GFAP) and S-100 protein were performed on 10 cerebellar hemangioblastomas in order to clarify the controversy over the origin of stromal cells. Neither cytoplasmic immunoreactivity for endothelial cell markers nor for anti-GFAP and anti-S-100 protein was found in these cells. Endothelial cell markers reacted positively only with neoplastic capillaries of the tumors and anti-GFAP and anti-S-100 protein were only found in glial remainders in the centers and margins of the tumors.