In addition, CBX1, CBX2, CBX3, CBX4, CBX5, CBX6, CBX7, and CBX8 were altered in 0.6, 1.3, 1, 2.6, 0.8, 1, 1, and 1.6% of the queried rectal cancer samples, respectively. This evidence concerns the gene CBX5 and rectal cancer.