title: Arthroscopic Treatment for External Snapping Hip.
abstract: OBJECTIVE
  The purpose of this study was to evaluate the clinical outcome of arthroscopic treatment for recalcitrant external snapping hip.
  
  
  METHODS
  Between September 2011 and June 2013, we evaluated 7 patients (10 cases) with snapping hip who were refractory to conservative treatments for at least 3 months. Two patients (4 cases) were impossible to adduct both knees in 90°of hip flexion. Surgery was done in lateral decubitus position, under spinal anesthesia. We made 2 arthroscopic portals to operate the patients, and used cross-cutting with flap resection technique to treat the lesion. We performed additional gluteal sling release in those 2 patients (4 cases) with adduction difficulty. Average follow-up length was 19 months (range, 12-33 months). Clinical improvement was evaluated with visual analog scale (VAS), modified Harris hip score (mHHS), and also investigated for presence of limping or other complications as well.
  
  
  RESULTS
  The VAS decreased from 6.8 (range, 6-9) preoperatively to 0.2 (range, 0-2) postoperatively, and the mHHS improved from 68.2 to 94.8 after surgery. None of the patients complained of post-operative wound problem or surgical complications.
  
  
  CONCLUSIONS
  The clinical outcome of arthroscopic treatment for recalcitrant external snapping hip was encouraging and all patients were also satisfied with the cosmetic results.
authors.affiliation: Department of Orthopaedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Jae Youn
authors.initials: JY
authors.lastname: Yoon
authors.affiliation: Department of Orthopedic Surgery, Joint and Spine Center, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Hong Suk
authors.initials: HS
authors.lastname: Kwak
authors.affiliation: Department of Orthopedic Surgery, Joint and Spine Center, SMG-SNU Boramae Medical Center, Seoul National University College of Medicine, Seoul, Korea.
authors.forename: Kang Sup
authors.initials: KS
authors.lastname: Yoon
authors.affiliation: Department of Orthopaedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Jae Suk
authors.initials: JS
authors.lastname: Chang
authors.affiliation: Department of Orthopaedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
authors.forename: Pil Whan
authors.initials: PW
authors.lastname: Yoon
keywords: Arthroscopy; External snapping hip; Gluteal sling release; Iliotibial band release