Stage IIIB includes: For squamous cell carcinoma: T3, N2, M0, Any G, Tumor location: Any. T3: Tumor invades adventitia. 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: T3, N2, M0, Any G. T3: Tumor invades adventitia. N2: Metastasis in 3-6 regional lymph nodes. M0: No distant metastasis. (AJCC 7th ed.) [from NCI]