Stage IIIA includes: (T1, N1, M0); (T2, N1, M0). T1: Tumor invades the submucosa (through the muscularis mucosa but not into the muscularis propria). T2: Tumor invades the muscularis propria. N1: One to three regional lymph nodes are positive (tumor in lymph node measuring 0.2 mm or more) or any number of tumor deposits is present, and all identifiable lymph nodes are negative. M0: No distant metastasis. (AJCC 8th ed.) [from NCI]