Stage II includes: IIA (T3, N0, M0); (T2, N1, M0); (T1, N2, M0); IIB (T4a, N0, M0); (T3, N1, M0); (T2, N2, M0); (T1, N3, M0). T1: Tumor invades lamina propria, muscularis mucosae, or submucosa. T2: Tumor invades the muscularis propria. T3: Tumor penetrates subserosal connective tissue without invasion of visceral peritoneum or adjacent structures. T4a: Tumor invades serosa (visceral peritoneum). N0: No regional lymph node metastasis. N1: Metastasis in 1-2 regional lymph nodes. N2: Metastasis in 3-6 regional lymph nodes. N3: Metastasis in seven or more regional lymph nodes. M0: No distant metastasis. (AJCC 7th ed.) [from NCI]