MUTYH-associated polyposis
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MUTYH-associated polyposis (also known as MYH-associated polyposis) is an autosomal recessive polyposis syndrome.[1] The disorder is caused by mutations in both alleles (genetic copies) of the DNA repair gene, MUTYH. The MUTYH gene encodes a base excision repair protein, which corrects oxidative damage to DNA. Affected individuals have an increased risk of colorectal cancer, precancerous colon polyps (adenomas) and an increased risk of several additional cancers. About 1–2 percent of the population possess a mutated copy of the MUTYH gene, and less than 1 percent of people have the MUTYH-associated polyposis syndrome. The presence of 10 or more colon adenomas should prompt consideration of MUTYH-associated polyposis, familial adenomatous polyposis and similar syndromes.[2]
MUTYH-associated polyposis | |
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Other names | MYH-associated polyposis |
Specialty | Medical genetics, gastroenterology |
Complications | Colorectal cancer |
Causes | DNA repair gene mutation |
Diagnostic method | Colonoscopy |
Differential diagnosis | Familial adenomatous polyposis, Lynch syndrome |
Treatment | Colonoscopy Polypectomy |
Frequency | <1% |