title: Femoroacetabular impingement: radiographic diagnosis--what the radiologist should know.
abstract: OBJECTIVE
  The purpose of this article is to show the important radiographic criteria that indicate the two types of femoroacetabular impingement: pincer and cam impingement. In addition, potential pitfalls in pelvic imaging concerning femoroacetabular impingement are shown.
  
  
  CONCLUSIONS
  Femoroacetabular impingement is a major cause for early "primary" osteoarthritis of the hip. It can easily be recognized on conventional radiographs of the pelvis and the proximal femur.
authors.affiliation: Department of Orthopaedic Surgery, Inselspital, University of Bern, Switzerland.
authors.forename: Moritz
authors.initials: M
authors.lastname: Tannast
authors.forename: Klaus A
authors.initials: KA
authors.lastname: Siebenrock
authors.forename: Suzanne E
authors.initials: SE
authors.lastname: Anderson
mesh_terms: D000077:Acetabulum / Q000002:abnormalities / Q000000981:diagnostic imaging; D000328:Adult; D005260:Female; D005269:Femur / Q000002:abnormalities / Q000000981:diagnostic imaging; D007722:Health Knowledge, Attitudes, Practice; D006621:Hip Joint / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D006801:Humans; D007592:Joint Diseases / Q000000981:diagnostic imaging*; D008297:Male; D017410:Practice Guidelines as Topic; D010818:Practice Patterns, Physicians'; D011856:Radiographic Image Enhancement / Q000379:methods; D013577:Syndrome