The authors used ESPGHAN recent "Porto Criteria" to investigate all the children they recruited.2 The diagnosis of IBD was based on Lennard-Jones' standard criteria.3 The authors used modified Vienna classification to characterize the phenotype of pediatric Crohn's disease (CD).1 The commonest location of CD at initial diagnosis was L3 + L4 (ileo-colonic + upper gastrointestinal [GI] involvement) in 85 children (31.1%) followed by L3 in 53 children (19.4%). The total number of children with upper GI involvement at diagnosis was 139 children (51%), but only a minority (6 children, 2.2%) had an isolated upper GI disease. Two or more years after diagnosis, 124 children had upper GI involvement out of a total number of 196 patients (63%).
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