Magnetic resonance imaging (MRI) colonography or enterography is increasingly used to assess disease activity and complications in inflammatory bowel disease (IBD).
However, no study has evaluated the role of this imaging technique to assess sacroiliitis.
Dr Leclerc-Jacob and colleagues from France assessed the prevalence of inflammatory sacroiliitis on MRI performed for IBD investigation.
The team's secondary aim was to elucidate clinico-biological factors associated with the presence of sacroiliitis.
The research team performed the study on 186 patients suffering from IBD followed in a gastroenterology department between 2004 and 2011.
Of these, 131 had Crohn's disease and 55 with ulcerative colitis.
|The prevalence of inflammatory sacroiliitis was 17%|
|Alimentary Pharmacology & Therapeutics|
Clinico-biological and endoscopic data were collected and MR enterography or colonography was performed to assess IBD activity on axial and coronal fat suppressed injected T1-weighted sequences.
On MRI, the team scored sacroiliitis blindly by two independent readers according to ASAS (Assessment of SpondyloArthritis international Society) criteria.
The team observed that the prevalence of inflammatory sacroiliitis was 17%.
Sacroiliitis was bilateral in 14 cases, and unilateral in 17 cases.
The researchers considered sacroiliac joints in 144 cases, and doubtful in 11 cases.
The team found that older age and female gender were significantly associated with the presence of sacroiliitis.
Other factors such as type of IBD, disease duration and localisation of IBD, surgery history, biological inflammation, bowel disease activity and treatment were not associated with sacroiliitis.
Dr Leclerc-Jacob and colleagues commented, "Inflammatory sacroiliitis was evidenced by MRI in 17% in patients suffering from IBD."
"Added to clinico-biological data, MRI analysis should contribute to an earlier diagnosis of axial spondylarthritis in patients with IBD."