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REVIEW

The Genetics of Colorectal Cancer

Paula M. Calvert, MD, and Harold Frucht, MD

1 October 2002 | Volume 137 Issue 7 | Pages 603-612

Colon cancer is a common disease that can be sporadic, familial, or inherited. Recent advances have contributed to the understanding of the molecular basis of these various patterns of colon cancer. Germline genetic mutations are the basis of inherited colon cancer syndromes; an accumulation of somatic mutations in a cell is the basis of sporadic colon cancer; and, in Ashkenazi Jewish persons, a mutation that was previously thought to be a polymorphism may cause familial colon cancer. Mutations of three different classes of genes have been described in colon cancer etiology: oncogenes, suppressor genes, and mismatch repair genes. Knowledge of many of the specific mutations responsible for colon carcinogenesis allows an understanding of the phenotypic manifestations observed and forms the basis of genetic testing for inherited disease. Although genetic testing is possible and available, it is only an adjunct to the clinical management of persons at risk for colon cancer and patients with colon cancer. As a result of advances in the understanding of the molecular causes of colon cancer and the availability of colon cancer screening methods such as colonoscopy, it should be possible to prevent the vast majority of colon cancer in our society. Practicing clinicians should recognize the patterns of clinical colon cancer, understand its causes, and be able to use genetic testing and endoscopic screening for prevention.

Author and Article Information

From Fox Chase Cancer Center, Philadelphia, Pennsylvania; and College of Physicians and Surgeons, Columbia University, New York, New York.

Acknowledgments: The authors thank Kathy Buchheit and Ellen Ragan for editorial and administrative support. They also thank Alfred G. Knudson, MD, PhD, for ongoing teaching, insight, and support; for careful review of the manuscript; and for helpful suggestions.

Grant Support: By the National Cancer Institute (CA 70335) (Dr. Frucht).

Requests for Single Reprints: Harold Frucht, MD, Division of Digestive and Liver Diseases, College of Physicians and Surgeons, Columbia University, 630 West 168th Street, Box 83, New York, NY 10032.

Current Author Addresses: Dr. Calvert: Tullamore General Hospital, Arden Road, Tullamore, County Offaly, Ireland.

Dr. Frucht: College of Physicians and Surgeons, Columbia University, Division of Digestive and Liver Diseases, 630 West 168th Street, Box 83, New York, NY 10032.

Related articles in Annals:

Summaries for Patients
The Genetics of Colorectal Cancer

Annals 2002 137: I-48. [Full Text]  

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