There was a significant association between CD24 expression and the cancer grade and the recurrence of the bladder tumors [low-grade (G1, 8 out of 29, 27.6%) and high-grade (G2–G3, 71 out of 96, 74.0%); recurrence-negative (22 out of 58, 37.9%) and recurrence-positive (57 out of 67, 85.1%)]. This evidence concerns the gene CD24 and cancer.