title: Anterior iliopsoas impingement due to a malpositioned acetabular component - effective relief by surgical cup reorientation.
abstract: BACKGROUND
  Determining the aetiology of persistent pain following total hip arthroplasty (THA) can be challenging. Impingement of the iliopsoas muscle due to a malpositioned acetabular component after THA might be a potential cause of postoperative groin pain.
  
  
  METHODS
  We retrospectively analysed the data of 12 consecutive patients from our orthopaedic department who underwent cup revision for painful iliopsoas impingement after primary THA.
  
  
  RESULTS
  Thorough physical examination as well as radiological assessment of the included patients revealed that malpositioning of the acetabular component provoked iliopsoas impingement.The Harris Hip Score and the orientation of the acetabular component before and after surgical revision at an average follow-up of 56 months were analysed.
  
  
  CONCLUSIONS
  We were able to demonstrate that surgical cup revision and reorientation resulted in distinctly improved scores and is a feasible option to effectively treat persistent iliopsoas impingement due to a malpositioned acetabular component following THA.
authors.affiliation: HELIOS ENDO-Klinik Hamburg, Hamburg - Germany.|Department of Trauma-, Hand- and Reconstructive Surgery, University Medical Centre Hamburg Eppendorf, Hamburg - Germany.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Schoof
authors.affiliation: Department of Trauma-, Hand- and Reconstructive Surgery, University Medical Centre Hamburg Eppendorf, Hamburg - Germany.
authors.forename: Oliver
authors.initials: O
authors.lastname: Jakobs
authors.affiliation: HELIOS ENDO-Klinik Hamburg, Hamburg - Germany.
authors.forename: Stefan
authors.initials: S
authors.lastname: Schmidl
authors.affiliation: HELIOS ENDO-Klinik Hamburg, Hamburg - Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Lausmann
authors.affiliation: Department of Trauma-, Hand- and Reconstructive Surgery, University Medical Centre Hamburg Eppendorf, Hamburg - Germany.
authors.forename: Florian
authors.initials: F
authors.lastname: Fensky
authors.affiliation: Sportklinik Stuttgart, Stuttgart - Germany.
authors.forename: Johannes
authors.initials: J
authors.lastname: Beckmann
authors.affiliation: HELIOS ENDO-Klinik Hamburg, Hamburg - Germany.
authors.forename: Thorsten
authors.initials: T
authors.lastname: Gehrke
authors.affiliation: HELIOS ENDO-Klinik Hamburg, Hamburg - Germany.|Department of Osteology, University Medical Center Hamburg Eppendorf, Hamburg - Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Gebauer
mesh_terms: D000077:Acetabulum / Q000503:physiopathology / Q000601:surgery*; D000328:Adult; D000368:Aged; D019644:Arthroplasty, Replacement, Hip / Q000009:adverse effects* / Q000379:methods; D059350:Chronic Pain / Q000209:etiology / Q000601:surgery; D015331:Cohort Studies; D005260:Female; D057925:Femoracetabular Impingement / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery*; D005500:Follow-Up Studies; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011475:Prosthesis Failure; D012086:Reoperation / Q000379:methods*; D012189:Retrospective Studies; D018570:Risk Assessment; D016896:Treatment Outcome