title: Osteogenic sarcoma of the breast arising in a cystosarcoma phyllodes.
mesh_terms: D001943:Breast Neoplasms / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology; D012516:Osteosarcoma / Q000473:pathology; D003557:Phyllodes Tumor / Q000473:pathology