Role of magnetic resonance defecography in the assessment of obstructed defecation syndrome.

Obstructed defecation syndrome (ODS) represents an important cause of constipation, primarily arising from dysfunctions within the pelvic floor. Characterized by an inability to complete defecation or effectively evacuate fecal material despite the urge to defecate, ODS results in a persistent sensation of incomplete evacuation and often requires excessive straining during defecation. Conventional clinical examinations fail to adequately assess the complex dynamic dysfunctions of the pelvic floor and anorectal region. Magnetic resonance defecography (MRD), a sophisticated form of dynamic pelvic floor imaging, provides a comprehensive, non-invasive means of visualizing and quantifying various anorectal and pelvic floor abnormalities. By allowing detailed assessment of structural and functional deficits during the defecation process, MRD plays a crucial role in the diagnostic workup of ODS, enabling colorectal surgeons to formulate more precise and individualized treatment strategies. This manuscript highlights the important anatomical and functional disorders of pelvic floor that are associated with ODS.