title: Role of sonography for the locoregional staging of breast cancer.
abstract: OBJECTIVE
  This article describes the use of sonography for the locoregional staging of breast cancer. Sonography may identify mammographically occult disease within the breast. Sonography of the regional nodal basins, including the axilla, infraclavicular, supraclavicular, and internal mammary regions, can identify nodal metastases, which may upstage disease and have implications for prognosis.
  
  
  CONCLUSIONS
  The anatomy of the regional nodal basins and the TNM staging system for breast cancer are reviewed, and the implications of ultrasound-detected disease on clinical management and treatment decisions are discussed.
authors.affiliation: 1 Department of Diagnostic Radiology, Section of Breast Imaging, The University of Texas M. D. Anderson Cancer Center, 1515 Holcombe Blvd, Unit 1350, Houston, TX 77030.
authors.forename: Deanna L
authors.initials: DL
authors.lastname: Lane
authors.forename: Modupe M
authors.initials: MM
authors.lastname: Adeyefa
authors.forename: Wei Tse
authors.initials: WT
authors.lastname: Yang
mesh_terms: D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008198:Lymph Nodes / Q000000981:diagnostic imaging*; D008207:Lymphatic Metastasis; D008875:Middle Aged; D009367:Neoplasm Staging; D016217:Ultrasonography, Mammary / Q000379:methods*
keywords: breast cancer; sonography; staging; ultrasound