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Summary
Presacral space width can indicate rectal disease, but normal measurements can exceed 15 mm in healthy individuals over 45. This finding challenges traditional diagnostic criteria for pelvic conditions.
Area of Science:
- Radiology
- Pelvic Anatomy
- Gastroenterology
Background:
- The presacral space (PSP) is a key anatomical region in pelvic imaging.
- Widening of the PSP is traditionally associated with rectal or pelvic pathologies.
- Established normal PSP width is typically considered ≤15 mm.
Purpose of the Study:
- To evaluate the upper limits of normal PSP width in asymptomatic individuals.
- To investigate age-related variations in PSP measurements.
- To refine diagnostic criteria for PSP abnormalities.
Main Methods:
- Retrospective analysis of pelvic CT or MRI scans.
- Measurement of PSP width in a cohort of patients without pelvic disease.
- Stratification of measurements by age group.
Main Results:
- A significant proportion of normal patients over 45 years exhibited PSP width >15 mm.
- PSP measurements exceeding 20 mm were observed in some healthy older individuals.
- This suggests age is a factor in normal PSP width.
Conclusions:
- The traditional 15 mm threshold for PSP width may not be universally applicable.
- Age >45 years is associated with a wider normal PSP.
- Consideration of patient age is crucial when interpreting PSP measurements to avoid misdiagnosis.