Posterior pelvic floor disorders and obstructed defecation syndrome: clinical and therapeutic approach.

There are no clear recommended imaging guidelines for the assessment of patients presenting primarily with obstructed defecation syndrome and defecation difficulty. The gold standard has always been the defecating proctogram which may require a rather poorly tolerated extended technique involving high-radiation exposure in young women which includes cystography, vaginography, small bowel opacification, and occasional peritoneography. The development of dynamic magnetic resonance imaging has obviated many of these extended techniques and may be supplemented by novel ultrasonographic methods including dynamic transperineal sonography, real-time 3D translabial ultrasound and 3D dynamic echodefecography. Patients potentially suitable for surgical treatment display a multiplicity of pelvic floor and perineal soft-tissue anomalies where one pathology (such as rectocele or enterocele) are considered dominant. Despite the introduction of recent stapled and robotic technologies, there is a dual dialog concerning the functional outcome of these procedures. Imaging and surgical algorithms for these patients are provided.