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Internal Snapping Hip Syndrome: Treatment by Endoscopic Release of the Iliopsoas Tendon

      Purpose: The internal snapping hip syndrome is caused by slippage of the iliopsoas tendon over the iliopectineal eminence or the femoral head. Open surgical techniques have been successfully used to treat this condition. More recently, endoscopic techniques have become available to address this problem. The purpose of this study was to investigate an endoscopic technique for release of the iliopsoas tendon and its short-term results. Type of Study: Consecutive case series. Methods: Six patients (7 hips) with an average age of 38.5 years had an endoscopic release of the iliopsoas tendon for internal snapping hip syndrome. Hip arthroscopy was performed in every patient. Special inferior portals were used for psoas bursoscopy. The iliopsoas tendon was identified and released at the level of the lesser trochanter in all cases. Results: Intra-articular concomitant injuries were identified and treated in 4 cases. No snapping symptoms were present in any patient after surgery nor at the last follow-up at, on average, 21 months. Significant loss of flexion strength was present after surgery but had improved by 8 weeks. Conclusions: In our hands, the endoscopic technique for iliopsoas tendon release was effective and reproducible and our results compare well with results of open procedures in the short term. Level of Evidence: Level IV.

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