- Serrated intestinal polyps (HP:0032222): The presence of multiple serrated polyps in the intestine. Unlike conventional adenomas, which are uniformly dysplastic, the vast majority of serrated lesions contain no dysplasia. The serrated class includes the hyperplastic polyps, which are not considered precancerous; sessile serrated polyps (also called sessile serrated adenomas); and traditional serrated adenomas. Sessile serrated polyps are larger on average and more often located in the proximal colon. Sessile serrated polyps have a more irregular surface, a pattern to the surface that has been called cloudlike, and indistinct edges compared with hyperplastic polyps. Sessile serrated polyps also have large open pits on the surface (type O pits) when viewed with magnification. Evidence: PCS. (PMID:27081527)
- Autosomal dominant inheritance (HP:0000006): A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in heterozygotes. In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele. Evidence: TAS. (OMIM:617108)
These phenotypes are associated with the disease sessile serrated polyposis cancer syndrome (OMIM:617108).