Abstract

Abstract Background Magnetic Resonance (MR) Imaging is the preferred imaging method in Inflammatory Bowel Disease (IBD) patients to investigate for small bowel disease. There are challenges in performing MR imaging in Early Onset IBD (EO-IBD) patients, and in particular in children with Very Early Onset IBD (VEO-IBD). These children often need a general anaesthetic which exposes them to adverse effects and preclude conventional luminal distention influencing the quality of the test. Therefore, the utility of MR imaging in this age group is questionable. Aims To assess the quality of MRI studies in VEO-IBD and EO-IBD patients and to compare the utility of this test between the two groups. Methods We retrospectively identified and reviewed IBD patients diagnosed under 10 years of age, between January 1999 and December 2011, from the British Columbia Children’s Hospital (BCCH) GI Division IBD database. Patients’ first diagnostic MRI results were recorded. Disease location and severity were documented according to the Paris classification. Results 124 patients were included in the cohort, 54 VEO-IBD and 70 EO-IBD patients (See Table 1). Median age at diagnosis was 6.46 (IQR 3.94–8.71), 65.32% males and 43.54% were diagnosed with Crohn’s disease. Overall, 52 patients underwent MRI, 17 (31.48%) in the VEO-IBD group and 35 (50%) in the EO-IBD group; median time from diagnosis to MRI was 3.02 years (IQR 1.08–5.83) for VEO-IBD and 0.44 years (IQR 0.07–1.58) for EO-IBD (p<0.001). In the EO-IBD group there was a significantly higher percentage of patients with MRI findings than in the VEO-IBD group, 23 (67.31%) and 5 (29.41%) respectively (p=0.014). Only one patient in the VEO-IBD group had a disease characteristic identified by MR imaging that could not be diagnosed by endoscopy (small bowel disease). Conclusions The diagnostic yield of MRI in children with VEO-IBD appears to be quite limited but requires further study. Funding Agencies None

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