Therapeutic Results of Proton Beam Therapy With Concurrent Chemotherapy for cT1 Esophageal Cancer and Salvage Endoscopic Therapy for Local Recurrence

Background Proton beam therapy (PBT) with concurrent chemotherapy is promising for esophageal squamous cell carcinoma (ESCC). The aim of study was to evaluate the outcome of concurrent chemo-proton therapy (CCPT), i.e., PBT with concurrent chemotherapy for cT1 ESCC and the salvage endoscopic therapy for local recurrence.