HOXA9 and neoplasm: HOXA9 raw letter analysis in colon cancer tissues expression abundance is high, the HOXA9 of protein expression in endothelial cells, can promote under inflammatory cytokines induce tissue adhesion, the function of inducing angiogenesis, promoting the characteristics of the tumour metastasis, therefore, and prone to metastasis after colon cancer drug resistance of characterization, so choose the gene as the research object.