At least 6 distinct varieties of hereditary polyposis of the gastrointestinal tract can be identified. The clinical and genetic characteristics are different. In 3 of the 6, the occurrence of extra-alimentary manifestations aids diagnosis. Intestinal polyposis illustrates the usefulness of genetic understanding in the practice of preventive medicine in families.
McKusick VA. Genetic Factors in Intestinal Polyposis. JAMA. 1962;182(3):271–277. doi:10.1001/jama.1962.03050420047012
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