title: Unusual giant cell tumor arising in a male breast.
abstract: An unusual giant cell tumor of the breast of a 72 year old man is reported. The microscopic and ultrastructural features of the tumor are presented in detail. Unusual and previously unreported myofibroblastic an myoepithelial differentiation of the spindle cell component is described. The possible histogenesis of the tumor is discussed.
mesh_terms: D000368:Aged; D001943:Breast Neoplasms / Q000473:pathology* / Q000601:surgery / Q000648:ultrastructure; D005870:Giant Cell Tumors / Q000473:pathology* / Q000601:surgery / Q000648:ultrastructure; D006801:Humans; D008297:Male; D008408:Mastectomy; D008854:Microscopy, Electron; D012737:Sex Factors