CD274 and gastric cancer: Recently, a plethora of studies has demonstrated the utility of 18F-FDG PET/CT imaging in forecasting the expression of PD-L1 across a diverse spectrum of tumors, encompassing cervical cancer, ovarian cancer, gastric cancer, bladder cancer, PDAC, CRC, NSCLC, HCC, and with non-invasiveness, continuity, and reproducibility138.