NCT01987518 - French Digestive Polyposis Cohorte Family Adenomatous Polyposis With APC and MYH Gene Mutations , Cowden's Disease With PTEN Gene Mutation, Peutz Jeghers Disease With STK 11 Gene Mutation ,juvénil Polyposis With SMAD 4 Gene Mutation , Serrated and Hyperplastic Polyposis | Crick | Crick