In subgroup analysis, PBRM1 mutations were observed to be linked with improved OS (HR: 0.650, 95 %CI: 0.440–0.960, p = 0.030), PFS (HR: 0.539, 95 %CI: 0.314–0.926, p = 0.025) and TTF (HR: 0.490, 95 %CI: 0.271–0.885, p = 0.018) in RCC patients receiving ICIs.