Cytoband 20q12 showed the highest frequency of gains that spanned from 39239931 to 41684451 bp with the involvement of eight genes, including PTPRT, CHD6, EMILIN3, LPIN3, PLCG1, TOP1, ZHX3 and MAFB. Of the eight genes, TOP1, PLCG1 and PTPRT were related to CRC. This evidence concerns the gene TOP1 and colorectal carcinoma.