Analysis revealed that 9 (69.23%) of 13 Meflin-high patients responded to ICI. In contrast, none (0%) of 8 Meflin-low patients showed any significant response (p-value: 0.0046). Furthermore, Kaplan–Meier survival analysis revealed, the Meflin-high group had a significantly favorable prognosis in OS (p-value:0.0137, hazard ratio 0.2959[0.06933 to 0.7097])...This analysis concluded that Meflin is a good predictive biomarker for ICI in ccRCC.