Osteosarcoma of the breast.
D000328:Adult; D001943:Breast Neoplasms / Q000473:pathology* / Q000601:surgery; D005260:Female; D006801:Humans; D008679:Metaplasia; D009362:Neoplasm Metastasis; D009364:Neoplasm Recurrence, Local; D012516:Osteosarcoma / Q000473:pathology* / Q000601:surgery; D003557:Phyllodes Tumor / Q000473:pathology / Q000601:surgery