Small bowel polyposis syndromes.

Intestinal polyposis syndromes are relatively rare. However, it is important for clinicians to recognize the potential risks of these syndromes. Based on histology, these syndromes can be classified mainly into hamartomatous polyposis syndromes and familial adenomatous polyposis (FAP), which affects mainly the large intestine. This review discusses the clinical manifestations and underlying genetics of the most common small intestinal polyposis syndromes: Peutz-Jeghers syndrome (PJS), juvenile polyposis (JP), PTEN hamartoma tumor syndrome (PHTS), and the small intestinal implications of familial adenomatous polyposis (FAP).