CTLA4 and nonpapillary renal cell carcinoma: Here, we developed a radiomics signature based on enhanced CT images using the data of matched patients from the Cancer Genome Atlas (TCGA) and the Cancer Imaging Archive (TCIA) databases to predict the CTLA4 mRNA expression levels in ccRCC and constructed a nomogram supported by radiomics signature scores and clinical parameters to predict overall survival in ccRCC patients.