Fast Five Quiz: Key Aspects of Metastatic Breast Cancer

Stefania Morganti, MD


December 15, 2022

cN3 breast cancer indicates evidence of metastases in ipsilateral infraclavicular (level III axillary) lymph node(s) — with or without level I, II axillary node involvement — or in ipsilateral internal mammary lymph node(s) with level I, II axillary lymph node metastasis; or metastasis in ipsilateral supraclavicular lymph node(s), with or without axillary or internal mammary lymph node involvement.

cN1 breast cancer indicates metastasis to movable ipsilateral level I, II axillary lymph node(s).

pN1 breast cancer indicates "micrometastases; or metastases in 1-3 axillary lymph nodes and/or in internal mammary nodes; and/or in clinically negative internal mammary nodes with micrometastases or macrometastases by sentinel lymph node biopsy."

cM1 breast cancer indicates distant metastases detected clinically and/or by imaging.

Learn more about breast cancer staging.


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