title: Granular cell myoblastoma of the orbit. Report of a case.
abstract: A light and electron microscopical study of a case of granular cell myoblastoma of the orbit is described. Its possible histogenesis is discussed and, from the study of this case and of the literature, it is believed that the most likely histogenesis is from a primitive mesenchymal cell resembling a fibroblast.
mesh_terms: D006651:Histocytochemistry; D006801:Humans; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009379:Neoplasms, Muscle Tissue / Q000378:metabolism / Q000473:pathology* / Q000648:ultrastructure; D009918:Orbital Neoplasms / Q000378:metabolism / Q000473:pathology* / Q000648:ultrastructure