Lorenzo Cereser1, Giovanni Zancan2, Ivan Giovannini3, Carmelo Cicciò4, Ilaria Tinazzi5, Angela Variola5, Matteo Bramuzzo6, Flora Maria Murru7, Marco Marino8, Annarita Tullio9, Salvatore De Vita3, Rossano Girometti2, Alen Zabotti2. 1. Institute of Radiology, Department of Medicine, University of Udine, University Hospital S. Maria Della Misericordia, ple S. Maria della Misericordia, 15-33100, Udine, Italy. lcereser@sirm.org. 2. Institute of Radiology, Department of Medicine, University of Udine, University Hospital S. Maria Della Misericordia, ple S. Maria della Misericordia, 15-33100, Udine, Italy. 3. Rheumatology Clinic, University of Udine, University Hospital S. Maria Della Misericordia, ple S. Maria della Misericordia, 15-33100, Udine, Italy. 4. Department of Diagnostic Imaging and Interventional Radiology, IRCCS Sacro Cuore Don Calabria Hospital, via don A. Sempreboni, 5-37024, Negrar di Valpolicella, Verona, Italy. 5. Department of Rheumatology, IRCCS Sacro Cuore Don Calabria Hospital, via don A. Sempreboni, 5-37024, Negrar di Valpolicella, Verona, Italy. 6. Gastroenterology, Digestive Endoscopy, and Nutrition Unit Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Via dell Istria 65/1-34137, Trieste, Italy. 7. Pediatric Radiology, IRCSS Burlo Garofolo, Via dell'Istria 65/1-34137, Trieste, Italy. 8. Department of Gastroenterology, Azienda Sanitaria Universitaria Friuli Centrale, University Hospital S. Maria Della Misericordia, p.le S. Maria della Misericordia, 15-33100, Udine, Italy. 9. Institute of Hygiene and Clinical Epidemiology, Azienda Sanitaria Universitaria Friuli Centrale, University Hospital S. Maria Della Misericordia, ple S. Maria della Misericordia, 15-33100, Udine, Italy.
Abstract
OBJECTIVES: Patients with Crohn's disease (CD) usually undergo magnetic resonance enterography (MRE) for evaluating small bowel involvement. Musculoskeletal symptoms are the most frequent extraintestinal manifestation in inflammatory bowel diseases, especially in CD, with sacroiliitis at imaging occurring in about 6-46% of patients and possibly correlating with axial spondyloarthritis. The primary study aim was to assess the prevalence of sacroiliitis in adult and pediatric patients with CD performing an MRE. We also evaluated the inter-rater agreement for MRE sacroiliitis and the association between sacroiliitis and patients' clinical data. METHOD: We retrospectively identified 100 adult and 30 pediatric patients diagnosed with CD who performed an MRE between December 2012 and May 2020 in three inflammatory bowel disease centers. Two radiologists assessed the prevalence of sacroiliitis at MRE. We evaluated the inter-rater agreement for sacroiliitis with Cohen's kappa and intraclass correlation coefficient statistics and assessed the correlation between sacroiliitis and demographic, clinical, and endoscopic data (Chi-square and Fisher's tests). RESULTS: The prevalence of sacroiliitis at MRE was 20% in adults and 6.7% in pediatric patients. The inter-rater agreement for sacroiliitis was substantial (k = 0.62, p < 0.001) in the adults and moderate (k = 0.46, p = 0.011) in the pediatric cohort. Age ≥ 50 years and the time between CD diagnosis and MRE (≥ 86.5 months) were significantly associated with sacroiliitis in adult patients (p = 0.049 and p = 0.038, respectively). CONCLUSIONS: Sacroiliitis is a frequent and reliable abnormality at MRE in adult patients with CD, associated with the age of the patients ≥ 50 years and CD duration.
OBJECTIVES: Patients with Crohn's disease (CD) usually undergo magnetic resonance enterography (MRE) for evaluating small bowel involvement. Musculoskeletal symptoms are the most frequent extraintestinal manifestation in inflammatory bowel diseases, especially in CD, with sacroiliitis at imaging occurring in about 6-46% of patients and possibly correlating with axial spondyloarthritis. The primary study aim was to assess the prevalence of sacroiliitis in adult and pediatric patients with CD performing an MRE. We also evaluated the inter-rater agreement for MRE sacroiliitis and the association between sacroiliitis and patients' clinical data. METHOD: We retrospectively identified 100 adult and 30 pediatric patients diagnosed with CD who performed an MRE between December 2012 and May 2020 in three inflammatory bowel disease centers. Two radiologists assessed the prevalence of sacroiliitis at MRE. We evaluated the inter-rater agreement for sacroiliitis with Cohen's kappa and intraclass correlation coefficient statistics and assessed the correlation between sacroiliitis and demographic, clinical, and endoscopic data (Chi-square and Fisher's tests). RESULTS: The prevalence of sacroiliitis at MRE was 20% in adults and 6.7% in pediatric patients. The inter-rater agreement for sacroiliitis was substantial (k = 0.62, p < 0.001) in the adults and moderate (k = 0.46, p = 0.011) in the pediatric cohort. Age ≥ 50 years and the time between CD diagnosis and MRE (≥ 86.5 months) were significantly associated with sacroiliitis in adult patients (p = 0.049 and p = 0.038, respectively). CONCLUSIONS: Sacroiliitis is a frequent and reliable abnormality at MRE in adult patients with CD, associated with the age of the patients ≥ 50 years and CD duration.
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