Diagnostic performance of dynamic MR defecography in assessment of dyssynergic defecation.

Purpose: To assess diagnostic performance of MR defecographic findings in diagnosis of dyssynergic defecation (DD).

Methods: This retrospective study included 46 patients with chronic constipation who met the Rome IV criteria for diagnosis of present or absent DD and underwent MRI between Jan 2015 and June 2020. Patients were divided into DD group (n = 24) and non-DD group (n = 22).