title: Selecting variations in extent of surgical procedure for breast cancer.
mesh_terms: D001943:Breast Neoplasms / Q000401:mortality / Q000532:radiotherapy / Q000601:surgery*; D005260:Female; D006801:Humans; D008197:Lymph Node Excision; D008408:Mastectomy; D008875:Middle Aged; D009362:Neoplasm Metastasis