ecrin-mdr-crcClinical2023familial adenomatous polyposisFamilial Adenomatous PolyposisObservationalhttps://newmdr.ecrin.org/Study/112905Japan9ECRIN MDRNot yet recruitingfalseProspective observational study on multiple small intestinal tumors in familial colorectal adenomatosisPrimary outcome(s): Endoscopic findings of small intestinal tumors in patients with FAP2023-09-15112905JPRN-UMIN000051968