A recent retrospective single-center study (I Jones et al. JPGN 2018; 66: 69-72) identified a high rate of inflammatory bowel disease (IBD) reclassification. From 2003-2014, 570 children were diagnosed with IBD, including 190 with ulcerative colitis. 29 of these patients underwent colectomy. Among this select group, 24% (7/29) were subsequently reclassified as having Crohn’s disease, sometimes several years later. Only two of the seven reclassified patients were younger than 10 years of age at the time of colectomy.
My take: This rate of Crohn’s disease following colectomy is higher than in previous reports (generally 5-10%). The larger point is that the diagnosis of ulcerative colitis is more uncertain in the pediatric population, particularly in those in the first decade of life.
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