title: Acetabular labral tears with underlying chondromalacia: a possible association with high-level running.
abstract: OBJECTIVE
  The use of hip arthroscopy has helped delineate intra-articular pathology and has enabled clinicians to further elucidate the factors responsible for injuries, such as running. The subtle development of degenerative changes may be a result of repetitive impact loading associated with this sport. This study presents a population of runners with common pathologic acetabular changes.
  
  
  METHODS
  Case series.
  
  
  METHODS
  Eight high-level runners with an average age of 36 years (range, 19 to 45 years) were seen for complaints of increasing hip pain with running without any history of macrotrauma. All of the patients had either run several marathons (4), were triathletes (1), Olympic middle distance runners (1), or had run more than 10 miles per week for longer than 5 years (2). Plain radiographic analysis revealed no degenerative changes and an average center-edge (CE) angle of 36.7 degrees (range, 28 degrees to 44 degrees).
  
  
  RESULTS
  All patients underwent hip arthroscopy with labral debridement. In 6 patients (75%), a chondral injury of the acetabular cartilage underlying the labral tear was noted. In addition, 3 patients had ligamentum teres disruptions.
  
  
  CONCLUSIONS
  It is possible that the development of these tears is the result of subtle instability, which may be exacerbated by running, eventually leading to labral tearing and possible ligamentum teres disruption. While perhaps concurrently, subtle acetabular dysplasia may play a role. Although this study does not confirm an association between running and the development of labral tears or chondral lesions in the hip, it certainly questions whether there is an injury pattern common to this population, a "runner's hip."
  
  
  METHODS
  Level IV.
authors.affiliation: Southern California Orthopedic Institute, Van Nuys, California 91405, USA. guanche@scoi.com
authors.forename: Carlos A
authors.initials: CA
authors.lastname: Guanche
authors.forename: Robby S
authors.initials: RS
authors.lastname: Sikka
mesh_terms: D000077:Acetabulum / Q000293:injuries*; D000328:Adult; D001182:Arthroscopy; D001265:Athletic Injuries / Q000175:diagnosis* / Q000601:surgery; D002357:Cartilage Diseases / Q000175:diagnosis*; D005260:Female; D025981:Hip Injuries / Q000601:surgery*; D006801:Humans; D008023:Ligaments, Articular / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012420:Running