In the AJCC Staging System, what does N represent?

In the AJCC Staging System, what does N represent?

• A. Number of tumors
• B. Nuclear grade
• C. Regional lymph node metastasis
• D. Neoplasia type

Answer: (C)

In the AJCC staging system, the letter N represents regional lymph node metastasis. The TNM framework is T for the primary tumor’s size and extent, N for whether cancer has spread to nearby regional lymph nodes, and M for distant metastasis. So N specifically flags involvement of lymph nodes that drain the tumor site, which is a key step in determining stage and prognosis. Other options don’t fit this term: number of tumors isn’t how N is defined, nuclear grade is a histologic grade of the tumor’s cells rather than nodal spread, and neoplasia type refers to the histologic type of cancer, not its nodal involvement.

In the AJCC staging system, the letter N represents regional lymph node metastasis. The TNM framework is T for the primary tumor’s size and extent, N for whether cancer has spread to nearby regional lymph nodes, and M for distant metastasis. So N specifically flags involvement of lymph nodes that drain the tumor site, which is a key step in determining stage and prognosis.

Other options don’t fit this term: number of tumors isn’t how N is defined, nuclear grade is a histologic grade of the tumor’s cells rather than nodal spread, and neoplasia type refers to the histologic type of cancer, not its nodal involvement.