KUMJ | VOL. 23 | NO. 1 | ISSUE 89 | JANAURY - MARCH 2025
Radiological Assessment of Femoroacetabular Impingement Morphology Using Computed Tomography in Asymptomatic Young Population
Koirala S, Gupta MK, Baral P, Adhikari K
Abstract: Background
Femoroacetabular impingement is regarded as precursor of osteoarthritis. Various
studies have discussed the prevalence of femoroacetabular morphology but only few
studies have been done on asymptomatic population using cross-sectional imaging.
Objective
To determine the prevalence of femoroacetabular impingement morphology in
young asymptomatic population on computed tomography.
Method
This cross-sectional study was done in 200 individuals who underwent computed
tomography for abdominal pathologies without any symptoms of hip pain, hip
pathology or osteoarthritis. Multiplanar images were reformatted and assessed for
the presence of parameters associated with femoroacetabular impingement; alpha
angle greater than 55°, femoral head-neck offset less than 8 mm, angle of acetabular
version less than 15°, lateral center edge angle greater than 40°.
Result
At least one of the femoroacetabular impingement morphology was detected in 162
hips. The prevalence of abnormal hip joint was higher in male patients than in female
patients (47.3% vs 31.8%). Prevalence of cam morphology was 14.5%, pincher was
17.5% and mixed morphology was 8.5%. Prevalence of cam and mixed morphology
were common in male hips however there was no statistically significant difference
in prevalence of pincher morphology between male and female hips.
Conclusion
Femoroacetabular morphology was noted with high frequency in asymptomatic
young population on computed tomography. Diagnosis of femoroacetabular
impingement syndrome should be based on combination of clinical and radiological
findings.
Keyword : Alpha-angle, Cam, Femoroacetabular impingement, Pincher