NCIt definition : 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.);