label: Clinical Stage I Esophageal Squamous Cell Carcinoma AJCC v8
label_lc: clinical stage i esophageal squamous cell carcinoma ajcc v8
description: "Stage I includes: T1, N0-1, M0. T1: Tumor invades the lamina propria, muscularis mucosae, or submucosa. N0: No regional lymph node metastasis. N1: Tumor with metastasis in one or two regional lymph nodes. M0: No distant metastasis. (AJCC 8th ed.)"