Comparing the 7th and 8th editions of the American Joint Committee on Cancer/Union for International Cancer Control TNM staging system for esophageal squamous cell carcinoma treated by definitive radiotherapy

Background We retrospectively compared the 7th and the 8th editions of The American Joint Committee on Cancer/Union for International Cancer Control (AJCC/UICC) TNM classification in the cohort of survival of the patients with esophageal squamous cell carcinoma (ESCC) treated by definitive radiotherapy.