Femoroacetabular impingement

Anderson, Suzanne E; Siebenrock, Klaus Arno; Tannast, Moritz (2012). Femoroacetabular impingement. European journal of radiology, 81(12), pp. 3740-4. Stuttgart: Elsevier 10.1016/j.ejrad.2007.03.020

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Femoroacetabular impingement (FAI) is a pathomechanical concept describing the early and painful contact of morphological changes of the hip joint, both on the acetabular, and femoral head sides. These can lead clinically to symptoms of hip and groin pain, and a limited range of motion with labral, chondral and bony lesions. Pincer impingement generally involves the acetabular side of the joint where there is excessive coverage of the acetabulum, which may be focal or more diffuse. There is linear contact of the acetabulum with the head/neck junction. Cam impingement involves the femoral head side of the joint where the head is associated with bony excrescences and is aspheric. The aspheric femoral head jams into the acetabulum. Imaging appearances are reviewed below. This type is evident in young males in the second and third decades. The main features of FAI are described.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Siebenrock, Klaus-Arno and Tannast, Moritz








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Date Deposited:

04 Oct 2013 14:30

Last Modified:

21 Mar 2016 10:30

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Web of Science ID:



https://boris.unibe.ch/id/eprint/11561 (FactScience: 217763)

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