title: Evidence of capsular defect following hip arthroscopy.
abstract: OBJECTIVE
  The purpose of this study is to identify the incidence of capsular defects in patients undergoing revision hip arthroscopy.
  
  
  METHODS
  A radiographic and anatomical analysis of MR arthrograms of patients undergoing revision arthroscopy was performed to assess for the presence of capsular defect. Intra-operative images and findings were reviewed. Patients with persistent cam and pincer lesions were excluded.
  
  
  RESULTS
  From October 2011 to October 2012, 25 patients underwent revision hip arthroscopy surgery, and 9 patients met our inclusion criteria. Within this series, all patients had post-surgical capsular irregularities and seven patients (78 %) had radiographic evidence of capsule and iliofemoral defects on MR arthrogram. Gross capsular defects were confirmed at revision surgery in two patients.
  
  
  CONCLUSIONS
  The findings of this study demonstrate post-surgical radiographic and anatomical evidence of capsular defects in a select group of patients following hip arthroscopy.
authors.affiliation: Hip Preservation Center, Division of Sports Medicine, Department of Orthopaedic Surgery, Rush University Medical Center, Rush Medical College, Rush University, Chicago, IL, USA, Drfrankmccormick@yahoo.com.
authors.forename: Frank
authors.initials: F
authors.lastname: McCormick
authors.forename: William
authors.initials: W
authors.lastname: Slikker
authors.forename: Joshua D
authors.initials: JD
authors.lastname: Harris
authors.forename: Anil K
authors.initials: AK
authors.lastname: Gupta
authors.forename: Geoffrey D
authors.initials: GD
authors.lastname: Abrams
authors.forename: Jonathan
authors.initials: J
authors.lastname: Frank
authors.forename: Bernard R
authors.initials: BR
authors.lastname: Bach
authors.forename: Shane J
authors.initials: SJ
authors.lastname: Nho
mesh_terms: D000328:Adult; D001175:Arthrography; D001182:Arthroscopy / Q000009:adverse effects*; D005260:Female; D006621:Hip Joint; D006801:Humans; D007049:Iatrogenic Disease; D015994:Incidence; D017746:Joint Capsule / Q000293:injuries*; D007592:Joint Diseases / Q000175:diagnosis* / Q000209:etiology; D007593:Joint Instability / Q000175:diagnosis / Q000209:etiology; D008279:Magnetic Resonance Imaging; D012086:Reoperation