However, no clear correlation was found between CD133 expression and histological grade (OR = 0.87, 95%CI = 0.60–1.27, P = .479), N category (OR = 1.18, 95%CI = 0.76–1.83, P = .464), tumor size (OR = 1.10, 95%CI = 0.82–1.49, P = .526), age (OR = 0.78, 95%CI = 0.48–1.27, P = .327), and sex (OR = 1.07, 95%CI = 0.93–1.24, P = .344). This evidence concerns the gene PROM1 and neoplasm.