Which statement describes N2 in TNM staging?

Which statement describes N2 in TNM staging?

• A. N0: no regional lymph node involvement.
• B. N1: metastasis in 1-3 regional lymph nodes.
• C. N2: metastasis in 4-9 regional lymph nodes.
• D. M0: no distant metastasis.

Answer: (C)

The main idea being tested is how regional lymph node involvement is categorized in TNM staging. In this system, N describes the number of regional lymph nodes that contain cancer. Specifically, N0 means no regional lymph node metastasis, N1 means metastasis in 1–3 regional lymph nodes, and N2 means metastasis in 4–9 regional lymph nodes. M0 indicates no distant metastasis, which is a separate category about spread beyond regional sites. So, the statement describing metastasis in 4–9 regional lymph nodes correctly identifies the N2 category. This level of nodal involvement is more extensive than N1 but not as extensive as higher N categories, and it helps guide prognosis and treatment planning.

The main idea being tested is how regional lymph node involvement is categorized in TNM staging. In this system, N describes the number of regional lymph nodes that contain cancer. Specifically, N0 means no regional lymph node metastasis, N1 means metastasis in 1–3 regional lymph nodes, and N2 means metastasis in 4–9 regional lymph nodes. M0 indicates no distant metastasis, which is a separate category about spread beyond regional sites.

So, the statement describing metastasis in 4–9 regional lymph nodes correctly identifies the N2 category. This level of nodal involvement is more extensive than N1 but not as extensive as higher N categories, and it helps guide prognosis and treatment planning.