has characteristic has characteristic Infantile onset juvenile polyposis syndrome juvenile polyposis of infancy https://www.malacards.org/card/juvenile_polyposis_of_infancy juvenile polyposis syndrome of infancy Orphanet:79076 icd11.foundation:378686036 infantile onset juvenile polyposis syndrome Juvenile polyposis of infancy (JPI) is the most severe form of juvenile gastrointestinal polyposis and is characterized by pancolonic hamartomatous polyposis from stomach to rectum, diagnosed in the first two years of life. MEDGEN:1778573 UMLS:C5445164 MONDO:0019190 infantile juvenile polyposis syndrome GARD:0016696