Spindle cell tumor in the breast.
D000368:Aged; D001943:Breast Neoplasms / Q000473:pathology / Q000601:surgery / Q000648:ultrastructure*; D002277:Carcinoma / Q000473:pathology / Q000601:surgery / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D013194:Staining and Labeling