Figure 1: The progression from polyp to cancer, that usually begins as set of benign polyps that protrude the mucosa. Firstly in (a), stages 0 and I of early colorectal cancer, a set of benign polyps that grow from the mucosal (hyper cell proliferation). In (b), stage II is a higher grade of dysplasia. In (c), stage III or adenocarcinoma and in (d), stage IV or an invasive cancer tumor.