title: Diagnosis and 2-year outcomes of endoscopic treatment for ischiofemoral impingement.
abstract: OBJECTIVE
  The 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.
  
  
  METHODS
  Five 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.
  
  
  RESULTS
  The 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.
  
  
  CONCLUSIONS
  The endoscopic treatment of IFI was effective at 2 years in 5 patients with consistent clinical and imaging diagnostic findings.
  
  
  METHODS
  Level IV, therapeutic case series.
authors.affiliation: Hip Preservation Center, Baylor University Medical Center at Dallas, Dallas, Texas, U.S.A.
authors.forename: Munif Ahmad
authors.initials: MA
authors.lastname: Hatem
authors.affiliation: Hip Preservation Center, Baylor University Medical Center at Dallas, Dallas, Texas, U.S.A.
authors.forename: Ian James
authors.initials: IJ
authors.lastname: Palmer
authors.affiliation: Hip Preservation Center, Baylor University Medical Center at Dallas, Dallas, Texas, U.S.A.. Electronic address: haldavidmartin@yahoo.com.
authors.forename: Hal David
authors.initials: HD
authors.lastname: Martin
mesh_terms: D000293:Adolescent; D000328:Adult; D001182:Arthroscopy; D001847:Bone Diseases / Q000175:diagnosis / Q000473:pathology / Q000601:surgery*; D004724:Endoscopy; D005260:Female; D005269:Femur / Q000473:pathology* / Q000601:surgery; D005500:Follow-Up Studies; D006615:Hip / Q000601:surgery*; D006621:Hip Joint / Q000601:surgery*; D006801:Humans; D007512:Ischium / Q000473:pathology*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000209:etiology; D012189:Retrospective Studies; D055815:Young Adult