Questioning the staging of tumor deposits of colorectal cancer in the eighth edition of the TNM classification: validation by prognosis.

Tumor deposits (TD) of colorectal cancer (CRC) in the 8 edition of TNM classification (TNM 8) were staged as N1c, but the number of TDs was ignored. The aim of this study was to analyze the association of TD with CRC and verify the rationale for TD staging in the TNM 8. A total of 517 patients with CRC, surgically treated from Aug.