Juvenile Polyposis Syndrome, also known as juvenile intestinal polyposis, is related to juvenile polyposis of infancy and juvenile polyposis/hereditary hemorrhagic telangiectasia syndrome. An important gene associated with Juvenile Polyposis Syndrome is SMAD4 (SMAD Family Member 4), and among its related pathways/superpathways are PAK Pathway and Homology Directed Repair. Affiliated tissues include colon and small intestine, and related phenotypes are rectal polyposis and juvenile colonic polyposis