The polyposis syndromes are disorders in which more than 100 gastrointestinal polyps are present throughout the GI tract:
- hereditary
- non-hereditary
- serrated polyposis syndrome (SPS), also known as hyperplastic polyposis syndrome
- Cronkhite-Canada syndrome
- juvenile polyposis syndrome *
* approximately 25% cases of juvenile polyposis syndrome are familial with AD inheritance and 75% non-hereditary 4
Polyposis syndromes can also be classified into those with predominantly adenomatous polyps and those with hamartomatous polyps:
- adenomatous
- hamartomatous
- mixed
- hereditary mixed polyposis syndrome
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