Stage III includes: (T4a, N1, M0); (T3, N2, M0); (T2, N3, M0); (T4b, N0, M0); (T4b, N1, M0); (T4a, N2, M0); (T3, N3, M0); (T4b, N2, M0); (T4b, N3, M0); (T4a, N3, M0). T2: Tumor invades the muscularis propria. T3: Tumor penetrates the subserosal connective tissue without invasion of the visceral peritoneum or adjacent structures. T4a: Tumor invades the serosa (visceral peritoneum). T4b: Tumor invades adjacent structures/organs. N0: No regional lymph node metastasis. N1: Tumor with metastasis in one or two regional lymph nodes. N2: Tumor with metastasis in three to six regional lymph nodes. N3: Tumor with metastasis in seven or more regional lymph nodes. M0: No distant metastasis. (AJCC 8th ed.) [from NCI]