This study consisted of two phases: the first phase was the dose exploration phase, and the second phase was the extension group. In phase I, 3 patients were enrolled, starting with imatinib monotherapy, 400mg qd, for 2 cycles (6 weeks), followed by imatinib 400mg qd combined with toripalimab 240mg q3w. If DLT was not observed, the original dose was extended to 37 patients in phase ii; If there was 1 DLT in the first stage, the number of patients in the first stage was extended to 6. If there was no DLT, the patients entered the extended stage. If ≥2 DLT cases occurred in the first phase, imatinib was reduced to 300mg QD and toripalimab 240mg q3W, and the 3+3 study was restarted. If DLT≤1 case, enter extended group (imatinib 300mg qd and toripalimab 240mg q3W); The longest cumulative use period of the two drugs was 2 years. When patients develop disease progression or develop intolerable toxicity, treatment is ended and follow-up for survival is entered.
It is a single-center, single-arm Phase II clinical study. This clinical trial aimed to evaluate the PFS of imatinib combined with toripalimab in stage III unresectable and stage IV melanoma with CKIT gene mutation.