ACOX1 and nonpapillary renal cell carcinoma: A lower ACOX1-positive rate was observed in 35 of 64 ccRCC tissues, while positive expression of ACOX1 was 47.5% (28 of 59) in normal tissue, suggesting ACOX1 downregulation in ccRCC (χ2 = 0.057, P = 0.858).