Book excerpt: Understanding Colorectal Cancer Anatomical Chart defines colorectal cancer and shows colorectal anatomy with the following pathologies: Adenocarcinoma of colon Circumferential carcinoma of the transverse colon Colonic polyps Adenocarcinoma of jejunum Adenocarcinoma of the rectosigmoid region The chart describes risk factors, signs and symptoms, screening and diagnostic tests, and treatment options, and illustrates and explains the stages of cancer.