Coexistence of Hip Torsional Deformities in Patients With Lumbar Disc Herniation; A Case-Control Study

Objective: Coexistence of lumbar spine disorder with hip diseases is defined as Hip-Spine syndrome, there might be a relation between torsional deformities of the hip and lumbar disc disease. Purpose of the present study was to find whether hip torsional parameters (femur, acetabular anteversion) and clinical findings (hip range of motion, hip score) differ in patients with lumbar disc disease. Method: Patients with lomber disc herniation (n: 20) and control subjects (n: 20) without any lumbar spine or hip disease were enrolled in the study. Femoral anteversion (FeAv), acetabular anteversion (AA), center of edge angle (CE), degree of hip flexion, extension, Harris Hip scores (HHS) were evaluated bilaterally. Results: HHS score, degree of extension plus flexion was lower at diseased side when it is compared to the control subjects (p < 0.001). Unilaterally affected patients had lower AA than control subjects (AA: 13 ± 40 vs16 ± 20 p: 0.01). Conclusion: As there is a link between hip and spine disorders, present study aims to find whether there is a causal relation between hip torsional deviations and lumbar disc disease. Partially supporting the hypothesis, diseased side had lower degrees of acetabular anteversion compared to control subjects at unilaterally affected patients. Mechanical and /or hip torsional parameters especially the acetabular retroversion may have an etiopathogenetic role in unilateral lumbar disc disease.