The cellular and molecular pathogenesis of colorectal cancer.

Abstract excerpt

The development of colorectal neoplasia originates from normal colonic mucosa, progresses to the adenomatous polyp, and later may evolve into carcinoma. This procession of histologic change can be defined by a series of successive waves of clonal expansion that contain certain genetic alterations. These genetic alterations include mutations in the K-ras oncogene and mutation in the one allele coupled with loss of...

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