CD163 and neoplasm: This study aims to evaluate FGFR1-4 expression in ccRCC and investigate its relationship with the tumor microenvironment, particularly TAM.<h4>Methods</h4>We primarily analyzed FGFR1-4 expression and CD163 positive cell count as estimation of TAM infiltration in 57 ccRCC specimens from patients undergoing nephrectomy using immunohistochemistry.