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  • Title: Baseline Wall Thickness Is Lower in Mucosa-Healed Segments 1 Year After Infliximab in Pediatric Crohn Disease Patients.
    Author: Kang B, Choi SY, Chi S, Lim Y, Jeon TY, Choe YH.
    Journal: J Pediatr Gastroenterol Nutr; 2017 Feb; 64(2):279-285. PubMed ID: 27050057.
    Abstract:
    OBJECTIVES: We aimed to quantitatively investigate the therapeutic response to combined immunosuppression treatment by magnetic resonance enterography (MRE) in active luminal Crohn disease (CD) in the pediatric population. METHODS: Pediatric patients with moderate-to-severe luminal CD, who received scheduled infliximab and azathioprine, were included in this preliminary study. Ileocolonoscopy and MRE were performed at baseline and at 1 year, and Simple Endoscopic Score for Crohn's Disease (SES-CD) and Magnetic Resonance Index of Activity (MaRIA) scores were calculated. The correlation between SES-CD and MaRIA scores were investigated with analysis per person and per segment. RESULTS: A total of 167 segments from 17 patients were evaluated by both Ileocolonoscopy and MRE. SES-CD and MaRIA scores showed significant correlations on both per-person analysis (ρ = 0.699, P < 0.001) and per-segment analysis (ρ = 0.596, P < 0.001). Analysis according to ileocolonic location of each segment revealed that the correlation strength was strongest in the right colon (ρ = 0.653, P < 0.001), whereas the correlation in the rectum was statistically insignificant (ρ = 0.29, P = 0.096). A comparative analysis of MaRIA components revealed a significantly thinner bowel wall thickness at baseline in endoscopically healed segments (50/65) compared with unhealed segments (15/65) (median 4.3 vs 7.2 mm, P = 0.036). CONCLUSIONS: Therapeutic response to combined immunosuppression at 1 year assessed by MRE correlates with ileocolonoscopy in pediatric patients with CD. Bowel wall thickness of the involved segments at baseline may affect treatment response to combined immunosuppression.
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