title: Hip arthroscopy improves symptoms associated with FAI in selected adolescent athletes.
abstract: BACKGROUND
  Femoroacetabular impingement (FAI) is increasingly diagnosed in young and middle-aged patients. Although arthroscopic procedures are becoming frequently used in the treatment of FAI, there are little data regarding rates of complications or the ability of hip arthroscopy to improve hip function specifically in the adolescent athlete population. Because arthroscopic treatment is being used in the treatment of FAI, it is vital to know what, if any, improvements in hip function can be expected and the potential complications.
  
  
  OBJECTIVE
  We asked (1) whether validated measures of hip function improve after arthroscopic treatment of FAI in adolescent athletes, and (2) what complications might be expected during and after arthroscopic treatment of FAI in these patients.
  
  
  METHODS
  We retrospectively reviewed the records of 27 hips in 21 patients 19 years of age or younger who underwent arthroscopic treatment for FAI between 2007 and 2008. From the records we extracted demographic data, operative details, complications, and preoperative and postoperative modified Harris hip scores (HHS) and the Hip Outcome Score (HOS). The minimum followup was 1 year (average, 1.5 years; range, 1-2.5 years).
  
  
  RESULTS
  Modified HHS improved by an average of 21 points, the activities of daily living subset of the HOS improved by an average of 16 points, and the sports outcome subset of the HOS improved by an average of 32 points. All patients' self-reported ability to engage in their preoperative level of athletic competition improved. In 24 hips that underwent cam decompression, the mean alpha-angle improved from 64° ± 16° to 40° ± 5.3° postoperatively.
  
  
  CONCLUSIONS
  We found short-term improvements in HOS and HHS with no complications for arthroscopic treatment of FAI in our cohort of adolescent athletes. We believe arthroscopic treatment of FAI by an experienced hip arthroscopist should be considered in selected patients when treating athletically active adolescents for whom nonoperative management fails.
authors.affiliation: Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021, USA. fabricantp@hss.edu
authors.forename: Peter D
authors.initials: PD
authors.lastname: Fabricant
authors.forename: Benton E
authors.initials: BE
authors.lastname: Heyworth
authors.forename: Bryan T
authors.initials: BT
authors.lastname: Kelly
mesh_terms: D000293:Adolescent; D001182:Arthroscopy / Q000379:methods*; D001265:Athletic Injuries / Q000150:complications* / Q000000981:diagnostic imaging; D015331:Cohort Studies; D005260:Female; D057925:Femoracetabular Impingement / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery*; D005500:Follow-Up Studies; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods; D008279:Magnetic Resonance Imaging / Q000379:methods; D019060:Minimally Invasive Surgical Procedures / Q000379:methods; D010147:Pain Measurement; D011300:Preoperative Care / Q000379:methods; D011859:Radiography; D016059:Range of Motion, Articular / Q000502:physiology*; D020127:Recovery of Function; D012189:Retrospective Studies; D016896:Treatment Outcome; D055815:Young Adult