title: A spindle cell breast lesion in a 54-year-old woman.
mesh_terms: D001943:Breast Neoplasms / Q000473:pathology / Q000601:surgery / Q000648:ultrastructure*; D002277:Carcinoma / Q000473:pathology / Q000601:surgery / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D008854:Microscopy, Electron; D008875:Middle Aged; D013194:Staining and Labeling