title: Intrinsic haematopoietic activity of cerebellar haemangioblastomas. Ultrastructural study of three cases.
abstract: Three cerebellar haemangioblastomas were studied by electron microscopy. One of these shows electron-dense granules within the tumour cells, indicative of erythropoietic activity, as previously described in a haemangioblastoma. The biological significance of these granules is discussed. Biological assay of serum erythropoietic activity was performed in one case.
mesh_terms: D002528:Cerebellar Neoplasms / Q000648:ultrastructure*; D004920:Erythropoiesis; D004921:Erythropoietin / Q000097:blood; D006394:Hemangiosarcoma / Q000648:ultrastructure*; D006410:Hematopoiesis; D006801:Humans; D008854:Microscopy, Electron
chemical_list: D004921:Erythropoietin