How is distant breast cancer metastasis staged?

Updated: Feb 04, 2021
  • Author: Pavani Chalasani, MD, MPH; Chief Editor: John V Kiluk, MD, FACS  more...
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Table. (Open Table in a new window)

Distant metastasis staging (M)


No clinical or radiographic evidence of distant metastasis


No clinical or radiographic evidence of distant metastases in the presence of tumor cells or deposits no larger than 0.2 mm detected microscopically or by molecular techniques in circulating blood, bone marrow, or other nonregional nodal tissue in a patient without symptoms or signs of metastase


Distant metastases detected by clinical and radiographic means 


Any histologically proven metastases in distant organs; or if in non-regional nodes, metastases > 0.2 mm