Development and validation of diagnostic criteria for IBD subtypes including IBdunclassified in children: a multicentre study from the pediatric IBD porto group of ESPGHAN
BACKGROUND:
The revised Porto criteria identify subtypes of paediatric inflammatory bowel diseases: ulcerative colitis [UC], atypical UC, inflammatory bowel disease unclassified [IBDU], and Crohn's disease [CD]. Others have proposed another subclassifiction of Crohn's colitis. In continuation of the Porto criteria, we aimed to derive and validate criteria, termed "PIBD-classes," for standardising the classification of the different IBD subtypes.