NCIt definition : Stage IIIA includes: (T1, N1, M0, Any G); (T2, N1, M0, Any G). T1: Tumor invades the
submucosa (through the muscularis mucosa but not into the muscularis propria). T2:
Tumor invades the muscularis propria. N1: Tumor involvement of one to three regional
lymph nodes (tumor in lymph node measuring greater than or equal to 0.2 mm) or any
number of tumor deposits is present with no tumor involvement in all identifiable
lymph nodes. M0: No distant metastasis. (AJCC 9th ed.);