A real-world clinical study of camrelizumab in the treatment of esophageal cancer.

Abstract

e16008 Background: Camrelizumab, a fully humanized monoclonal antibody against PD-1, has been approved in the treatment of advanced esophageal squamous carcinoma in China. The purpose of this study was to observe the efficacy and safety of Camrelizumab in the treatment of esophageal cancer in the real world. Methods: This is an open-label, prospective, multicenter, observational study. Eligible patients (pts) who received Camrelizumab had esophageal cancer; age≥18, ECOG PS of 0-2; and measurable disease. Results: As of November 30, 2020, a total of 229 patients were enrolled, of which 192 were male (83.8%). The ECOG PS score was 0 in 48 cases (21.0%), 1 in 149 cases (65.0%), and 2 in 32 cases (14.0%). Among the 134 patients of stage IV patients (58.5%), 174 patients had metastases (76.0%), and 99% of patients did not undergo PD-L1 testing. A history of radiotherapy accounted for 57.6%, and a history of surgery on the primary lesion accounted for 42%. Camrelizumab accounted for 26.2% of the first-line treatment, 33.6% of the second-line treatment, and 35.4% of the third-line and above. Camrelizumab combined with chemotherapy accounted for 40%, combined with anti-angiogenesis therapy accounted for 38.0%, combined with anti-angiogenesis + chemotherapy accounted for 9.0%, and combined radiotherapy accounted for 6.2%. Among 145 patients with evaluable efficacy, 5 cases of CR, 14 cases of PR, 97 cases of SD, and 29 cases of PD. The ORR reached 13.1% and the DCR reached 80.0%. The overall adverse event rate was 42.8%, the major adverse event RCCEP rate was 11.7%, pneumonia was 8.3%, and fatigue was 4.1%. Adverse events greater than or equal to grade 3 included 1 case of RCCEP, 3 cases of bleeding, 1 case of diarrhea, and 1 case of fever. Conclusions: In this real-world study of esophageal cancer, most of the patients enrolled were patients with poor PS score and late stage, but the efficacy and safety of Camrelizumab in patients with advanced esophageal cancer were still confirmed. The dominant population and combination therapy are still under study. Clinical trial information: ChiCTR1900027275.