[Stage IV would include T4b NO MO/any T N1 MO/ any T N2 MO/ any T N3 MO/ any T any N M1. T4b: Tumor invades the pelvic wall, abdominal wall. N1: Metastasis in a single lymph node, 2 cm or less in greatest dimension. N2: Metastasis in a single lymph node, more than 2 cm but not more than 5 cm in greatest dimension; or multiple lymph nodes, none more than 5 cm in greatest dimension. N3: Metastasis in a lymph node more than 5 cm in greatest dimension. M1: Distant metastasis ( NCI )]
UMLS (NCI) C0855191