In TNM staging, what does M0 signify?

In TNM staging, what does M0 signify?

• A. Distant metastasis present.
• B. Inconclusive metastasis status.
• C. No distant metastasis.
• D. Metastasis confined to the regional lymph nodes.

Answer: (C)

In TNM staging, the M component indicates distant metastasis. When there are no distant metastases found, this is recorded as M0, meaning no distant spread. If metastases were present in distant organs, it would be M1. Regional lymph node involvement is categorized under N, not M, and an inconclusive metastasis status would be Mx. So the statement that there is no distant metastasis best matches M0.

In TNM staging, the M component indicates distant metastasis. When there are no distant metastases found, this is recorded as M0, meaning no distant spread. If metastases were present in distant organs, it would be M1. Regional lymph node involvement is categorized under N, not M, and an inconclusive metastasis status would be Mx. So the statement that there is no distant metastasis best matches M0.