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Imaging of Obstructed Defecation
Rania Farouk El Sayed, MD, PhD
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Terminology

  • Abbreviations

    • Obstructed defecation (OBD)

Pathophysiology of Constipation

  • General Considerations

    • 2 Major Types of Constipation

      Abnormalities of Rectal Evacuation

      • Rectocele

        • Descending Perineum Syndrome (Pelvic Floor Descent)

          • Intussusception and Rectal Prolapse

            • Dyskinetic Puborectalis

              • Solitary Rectal Ulcer Syndrome

                • Congenital Disorders

                  Imaging Findings

                  • Rectocele

                    • Descending Perineum Syndrome (Pelvic Floor Descent)

                      • Intussusception and Rectal Prolapse

                        • Dyskinetic Puborectalis

                          • Spastic Anal Sphincter Contraction

                            • Abnormalities of IAS in Patients With Obstructed Defecation

                              • Congenital Disorders

                                Selected References

                                1. Bartram C et al: Imaging Pelvic Floor Disorders. 1st ed. New York: Springer. 159-164, 2003
                                2. Delancey JOL: Functional anatomy of the pelvic floor. In Bartram C et al: Imaging Pelvic Floor Disorders. 1st ed. New York: Springer. 27-38, 2003
                                3. Fielding JR: Practical MR imaging of female pelvic floor weakness. Radiographics. 22(2):295-304, 2002
                                4. Beets-Tan RG et al: Measurement of anal sphincter muscles: endoanal US, endoanal MR imaging, or phased-array MR imaging? A study with healthy volunteers. Radiology. 220(1):81-9, 2001
                                5. Beets-Tan RG et al: High-resolution magnetic resonance imaging of the anorectal region without an endocoil. Abdom Imaging. 24(6):576-81; discussion 582-4, 1999
                                6. Farag A: Use of the Hagen-Poiseuille law: a new mathematical approach for the integration and evaluation of anorectal physiological testing in patients with faecal incontinence and pelvic dyschezia and in normal controls. Eur Surg Res. 30(4):279-89, 1998
                                7. Altringer WE et al: Four-contrast defecography: pelvic "floor-oscopy". Dis Colon Rectum. 38(7):695-9, 1995
                                8. deSouza NM et al: MRI of the anal sphincter. J Comput Assist Tomogr. 19(5):745-51, 1995
                                9. Delemarre JB et al: Anterior rectocele: assessment with radiographic defecography, dynamic magnetic resonance imaging, and physical examination. Dis Colon Rectum. 37(3):249-59, 1994
                                10. Bartram CI: Evacuation proctography and anal endosonography. In: Henry M et al: Coloproctology and the Pelvic Floor. 2nd ed. Oxford: Butterworth-Heinemann Ltd. 146-72, 1992
                                11. Benson JT: Female Pelvic Floor Disorders. Investigation and Management. New York: Norton, 1992
                                Related Anatomy
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                                Related Differential Diagnoses
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                                References
                                Tables

                                Tables

                                Terminology

                                • Abbreviations

                                  • Obstructed defecation (OBD)

                                Pathophysiology of Constipation

                                • General Considerations

                                  • 2 Major Types of Constipation

                                    Abnormalities of Rectal Evacuation

                                    • Rectocele

                                      • Descending Perineum Syndrome (Pelvic Floor Descent)

                                        • Intussusception and Rectal Prolapse

                                          • Dyskinetic Puborectalis

                                            • Solitary Rectal Ulcer Syndrome

                                              • Congenital Disorders

                                                Imaging Findings

                                                • Rectocele

                                                  • Descending Perineum Syndrome (Pelvic Floor Descent)

                                                    • Intussusception and Rectal Prolapse

                                                      • Dyskinetic Puborectalis

                                                        • Spastic Anal Sphincter Contraction

                                                          • Abnormalities of IAS in Patients With Obstructed Defecation

                                                            • Congenital Disorders

                                                              Selected References

                                                              1. Bartram C et al: Imaging Pelvic Floor Disorders. 1st ed. New York: Springer. 159-164, 2003
                                                              2. Delancey JOL: Functional anatomy of the pelvic floor. In Bartram C et al: Imaging Pelvic Floor Disorders. 1st ed. New York: Springer. 27-38, 2003
                                                              3. Fielding JR: Practical MR imaging of female pelvic floor weakness. Radiographics. 22(2):295-304, 2002
                                                              4. Beets-Tan RG et al: Measurement of anal sphincter muscles: endoanal US, endoanal MR imaging, or phased-array MR imaging? A study with healthy volunteers. Radiology. 220(1):81-9, 2001
                                                              5. Beets-Tan RG et al: High-resolution magnetic resonance imaging of the anorectal region without an endocoil. Abdom Imaging. 24(6):576-81; discussion 582-4, 1999
                                                              6. Farag A: Use of the Hagen-Poiseuille law: a new mathematical approach for the integration and evaluation of anorectal physiological testing in patients with faecal incontinence and pelvic dyschezia and in normal controls. Eur Surg Res. 30(4):279-89, 1998
                                                              7. Altringer WE et al: Four-contrast defecography: pelvic "floor-oscopy". Dis Colon Rectum. 38(7):695-9, 1995
                                                              8. deSouza NM et al: MRI of the anal sphincter. J Comput Assist Tomogr. 19(5):745-51, 1995
                                                              9. Delemarre JB et al: Anterior rectocele: assessment with radiographic defecography, dynamic magnetic resonance imaging, and physical examination. Dis Colon Rectum. 37(3):249-59, 1994
                                                              10. Bartram CI: Evacuation proctography and anal endosonography. In: Henry M et al: Coloproctology and the Pelvic Floor. 2nd ed. Oxford: Butterworth-Heinemann Ltd. 146-72, 1992
                                                              11. Benson JT: Female Pelvic Floor Disorders. Investigation and Management. New York: Norton, 1992