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: M
authors.initials: M
authors.lastname: Tannast
authors.forename: K A
authors.initials: KA
authors.lastname: Siebenrock
authors.forename: S E
authors.initials: SE
authors.lastname: Anderson
mesh_terms: D000077:Acetabulum; D000328:Adult; D005260:Female; D005269:Femur; D006621:Hip Joint; D006801:Humans; D007592:Joint Diseases / Q000145:classification* / Q000000981:diagnostic imaging*; D008297:Male; D011859:Radiography; D055815:Young Adult