Stage IIIA includes: For squamous cell carcinoma: (T1-2, N2, M0, Any G, Tumor location: Any); (T3, N1, M0, Any G, Tumor location: Any); (T4a, N0, M0, Any G, Tumor location: Any). T1: Tumor invades lamina propria, muscularis mucosae, or submucosa. T2: Tumor invades muscularis propria. T3: Tumor invades adventitia. T4a: Resectable tumor invading pleura, pericardium, or diaphragm. N0: No regional lymph node metastasis. N1: Metastasis in 1-2 regional lymph nodes. N2: Metastasis in 3-6 regional lymph nodes. M0: No distant metastasis. Tumor location: Location of the primary cancer site is defined by the position of the upper (proximal) edge of the tumor in the esophagus. For adenocarcinoma: (T1-2, N2, M0, Any G); (T3, N1, M0, Any G); (T4a, N0, M0, Any G). T1: Tumor invades lamina propria, muscularis mucosae, or submucosa. T2: Tumor invades muscularis propria. T3: Tumor invades adventitia. T4a: Resectable tumor invading pleura, pericardium, or diaphragm. N0: No regional lymph node metastasis. N1: Metastasis in 1-2 regional lymph nodes. N2: Metastasis in 3-6 regional lymph nodes. M0: No distant metastasis. (AJCC 7th ed.) [from NCI]