The cases of colorectal cancer are increasing worldwide. The researches and studies in this field would be helpful to provide some efficient therapeutic measures for colorectal cancer. This book presents some basic steps being taken in order to understand and diagnose this disease. This book discusses the analysis done by scientists on the data and evidences available related to genes, infections related to colorectal cancer and other factors. The escalating research and study into the aspects of genes and genetic background associated with colorectal cancer cellular, the molecular biochemical involved in colorectal carcinogenesis and tumor progression and its complexities have been described in the book. This text is a valuable account of information for scientists, researchers and medical professionals engaged in this field.