• Munif Ahmad Hatem, Ian James Palmer, and Hal David Martin.
• Hip Preservation Center, Baylor University Medical Center at Dallas, Dallas, Texas, U.S.A.
• Arthroscopy. 2015 Feb 1; 31 (2): 239-46.

PurposeThe purposes of this study were to investigate the clinical and radiographic presentation of patients with ischiofemoral impingement (IFI) and to assess the outcomes of endoscopic treatment with partial resection of the lesser trochanter.MethodsFive patients with IFI who underwent endoscopic treatment with partial resection of the lesser trochanter were retrospectively reviewed. The outcomes were assessed at a mean follow-up of 2.3 years (range, 2 to 2.5 years) through the modified Harris Hip Score and a visual analog scale score for pain. Physical examination tests provoking the impingement between the lesser trochanter and ischium were used for the diagnosis of IFI, including the IFI test and reproducible pain lateral to the ischium with the long-stride walking test. The presence of quadratus femoris muscle edema and a decreased ischiofemoral space on magnetic resonance imaging was also necessary for the diagnosis.ResultsThe mean modified Harris Hip Score increased from 51.3 points (range, 34.1 to 73.7 points) preoperatively to 94.2 points (range, 78.1 to 100 points) at the final follow-up (P = .003). The mean visual analog scale score for pain decreased from 6.6 (range, 6 to 7.3) before surgery to 1 (range, 0 to 4) at the final follow-up (P = .001). The mean duration to return to sport after surgery was 4.4 months (range, 1 to 7 months) for the 5 patients in this study. No complication was observed.ConclusionsThe endoscopic treatment of IFI was effective at 2 years in 5 patients with consistent clinical and imaging diagnostic findings.Level Of EvidenceLevel IV, therapeutic case series.Copyright © 2015 Arthroscopy Association of North America. Published by Elsevier Inc. All rights reserved.

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