A Clinical Study of Chemoradiotherapy Sequential Fluzoparib in Pan-solid Tumors

Arm A: untreated surgically resectable rectal cancer. Patients accept preoperative long-range synchronous chemoradiotherapy → fluzoparib combined with capecitabine (Q3W, 4 treatment cycles) → surgery → observation and follow-up Arm B, C and D: include untreated locally advanced unresectable non-small cell lung cancer, esophageal squamous cell carcinoma and cervical carcinoma. Patients accept radical synchronous chemoradiotherapy following → fluzoparib combined with camrelizumab or fluzoparib monotherapy maintenance treatment for 17 cycles