Sentinel node biopsy.
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001365:Axilla; D001706:Biopsy / Q000379:methods; D001943:Breast Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology*; D008207:Lymphatic Metastasis / Q000473:pathology; D008875:Middle Aged