Familial Adenomatous Polyposis 4, is also known as msh3-related attenuated familial adenomatous polyposis. An important gene associated with Familial Adenomatous Polyposis 4 is MSH3 (MutS Homolog 3). Affiliated tissues include colon and thyroid, and related phenotypes are colorectal polyposis and adenomatous colonic polyposis