T Stage
Tis Carcinoma in situ
T0 No evidence of primary tumor
T1 Tumor £ 2 cm in greatest dimension
T2 Tumor >2 cm but £ 5 cm in greatest dimension
T3 Tumor >5 cm in greatest dimension
T4 Tumor of any size that invades adjacent organs including the vagina, urethra, or bladder. Tumors that invade the anal sphincter only do not quality as T4 tumors
N Stage
N0 No evidence of spread to the lymph node
N1 Spread of cancer to the lymph nodes directly adjacent to the rectum (perirectal lymph nodes)
N2 Spread of the cancer to lymph nodes of the inguinal or internal iliac lymph node chains on one side
N3 Spread of the cancer to lymph nodes of the inguinal or internal iliac lymph node chains on both sides OR cancer involvement of both the perirectal lymph nodes and the inguinal lymph nodes
M Stage
M0 No evidence of distant spread of the cancer
M1 Evidence of distant spread of the cancer including spread to lymph node chains other than the ones lists under "N stage"
