Femoroacetabular impingement: radiographic diagnosis--what the radiologist should know.

Tannast, Moritz; Siebenrock, Klaus A; Anderson, Suzanne E · AJR Am J Roentgenol · 2007

review · Level V

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Abstract

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. 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.

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