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Sex differences in anorectal angle and perineal descent
Gastrointestinal Radiology
|January 1, 1987
Summary
Anorectal angle (ARA) measurements show significant sex differences, with male values lacking clinical utility. Perineal descent (D) is similar in both sexes and may aid in surgical evaluation.
Area of Science:
- Anorectal physiology
- Pelvic floor disorders
- Diagnostic imaging
Background:
- Sex differences in pelvic floor anatomy and function are not fully understood.
- Anorectal angle (ARA) and perineal descent (D) are key parameters in evaluating anorectal function.
- Cinedefecography is a valuable tool for assessing these parameters.
Purpose of the Study:
- To investigate the influence of sex on anorectal angle (ARA) and perineal descent (D).
- To determine the clinical relevance of ARA and D in asymptomatic individuals.
Main Methods:
- Asymptomatic male and female volunteers underwent cinedefecography.
- Measurements of anorectal angle (ARA) and perineal descent (D) were recorded.
- Statistical analysis was performed to compare values between sexes.
Main Results:
- Anorectal angle (ARA) was generally larger in males than females.
- Male ARA values overlapped with those seen in females with anal incompetence.
- The range of normal ARA in males was twice that in females, indicating limited diagnostic value.
- Perineal descent (D) showed no significant difference between sexes.
Conclusions:
- Anorectal angle (ARA) measurements in males lack clinical significance.
- Perineal descent (D) is a potentially useful parameter for preoperative evaluation in both male and female patients undergoing corrective surgery.