Unresectable Malignant Neoplasm

This prospective, multicenter, observational cohort study will enroll 60 adults with unresectable larege tumors (longest diameter \> 5 cm) who receive one of two treatment modes: (A) proton P-SABR, in which both the proton partial-SABR boost (course 1) and the subsequent proton CFRT (course 2) are delivered at the proton center; or (B) proton-photon hybrid P-SABR, in which course 1 is delivered with protons at the proton center and course 2 CFRT is delivered with photons. The primary objective is to describe, in each cohort, the incidence of treatment-related grade ≥ 3 acute and late adverse events (CTCAE v5.0). Secondary objectives are dosimetric and the 1-year local control rate (RECIST 1.1, in-field). Participants are followed for up to 5 years.

This phase I/II clinical study is designed to evaluate the 1 year local tumor control rate of chemoradiotherapy using albumin-bound paclitaxel and cisplatin in unresectable esophageal squamous cell carcinomas based on Nutritional Risk Screening NRS2002.