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Breast

  • American Joint Committee on Cancer

Summary of Changes

Micrometastases are distinguished from isolated tumor cells on the basis of size and histologic evidence of malignant activity.

Identifiers have been added to indicate the use of sentinel lymph node dissection and immunohistochemical or molecular techniques.

Major classifications of lymph node status are designated according to the number of involved axillary lymph nodes as determined by routine hematoxylin and eosin staining (preferred method) or by immunohistochemical staining.

The classification of metastasis to the infraclavicular lymph nodes has been added as N3.

Metastasis to the internal mammary nodes, based on the method of detection and the presence or absence of axillary nodal involvement, has been reclassified. Microscopic involvement of the internal mammary nodes detected by sentinel lymph node dissection using lymphoscintigraphy but not by imaging studies or clinical examination is classified as N1. Macroscopic involvement of the internal mammary nodes as detected by imaging studies (excluding lymphoscintigraphy) or by clinical examination is classified as N2 if it occurs in the absence of metastases to the axillary lymph nodes or as N3 if it occurs in the presence of metastases to the axillary lymph nodes.

Metastasis to the supraclavicular lymph nodes has been reclassified as N3 rather than M1.

Keywords

Breast Cancer Sentinel Lymph Node Axillary Lymph Node American Joint Committee Isolate Tumor Cell 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2002

Authors and Affiliations

  • American Joint Committee on Cancer
    • 1
  1. 1.Executive OfficeChicagoUSA

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