title: Internal snapping hip syndrome: treatment by endoscopic release of the iliopsoas tendon.
abstract: OBJECTIVE
  The internal snapping hip syndrome is caused by slippage of the iliopsoas tendon over the iliopectineal eminence or the femoral head. Open surgical techniques have been successfully used to treat this condition. More recently, endoscopic techniques have become available to address this problem. The purpose of this study was to investigate an endoscopic technique for release of the iliopsoas tendon and its short-term results.
  
  
  METHODS
  Consecutive case series.
  
  
  METHODS
  Six patients (7 hips) with an average age of 38.5 years had an endoscopic release of the iliopsoas tendon for internal snapping hip syndrome. Hip arthroscopy was performed in every patient. Special inferior portals were used for psoas bursoscopy. The iliopsoas tendon was identified and released at the level of the lesser trochanter in all cases.
  
  
  RESULTS
  Intra-articular concomitant injuries were identified and treated in 4 cases. No snapping symptoms were present in any patient after surgery nor at the last follow-up at, on average, 21 months. Significant loss of flexion strength was present after surgery but had improved by 8 weeks.
  
  
  CONCLUSIONS
  In our hands, the endoscopic technique for iliopsoas tendon release was effective and reproducible and our results compare well with results of open procedures in the short term.
  
  
  METHODS
  Level IV.
authors.affiliation: Division of Joint Disease at the Institute of Orthopedics in the National Center for Rehabilitation of Mexico, Mexico City, Mexico. vichip2002@yahoo.com.mx
authors.forename: Victor M
authors.initials: VM
authors.lastname: Ilizaliturri
authors.forename: Felix E
authors.initials: FE
authors.lastname: Villalobos
authors.forename: Pedro A
authors.initials: PA
authors.lastname: Chaidez
authors.forename: Fernando S
authors.initials: FS
authors.lastname: Valero
authors.forename: Jose M
authors.initials: JM
authors.lastname: Aguilera
mesh_terms: D000328:Adult; D001182:Arthroscopy; D002061:Bursa, Synovial / Q000601:surgery; D005260:Female; D005270:Femur Head; D005500:Follow-Up Studies; D006621:Hip Joint / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D012074:Remission Induction; D015203:Reproducibility of Results; D013710:Tendons / Q000601:surgery*; D016896:Treatment Outcome