Percentage of CD14+HLA-DRlow/− monocytes in circulating blood is increased in patients with RCC. (A) Representative FACS analysis of CD14+HLA-DRlow/− monocytes in the peripheral blood mononuclear cells of a healthy control donor and a patient with RCC. (B) The percentage of CD14+HLA-DRlow/− monocytes in circulating CD14+ monocytes of healthy donors and patients was analyzed. The difference between the groups was statistically analyzed using the Mann-Whitney U test. (C) The percentage of CD14+HLA-DRlow/− monocytes in blood samples of 4 RCC patients pre-surgery and post-surgery. Left panel: Representative FACS analysis of pt.4. Right panel: Quantification of all patients. CD, cluster of differentiation; HLA, human leukocyte antigen; RCC, renal cell carcinoma; HLA-DRlow/−, cells with a lower HLA-DR expression or are negative for HLA-DR; FSC, forward scatter; SSC, side scatter; PE, phycoerythrin; FITC, fluorescein isothiocyanate; Pt, patient; FACS, fluorescence-activated cell sorting.