[The labrum acetabulare].

There are two types of labrum acetabulare lesions. The first, posterior in the labrum, must be evocated when hip pain occurs secondary after slight traumatisms. The second, much more frequent, superior in the labrum, is responsible for important hip pain contrasting with slight X-ray abnormalities of the pelvis, except for frequent acetabular dysplasia. Not only arthrography, but also coronal arthro-tomography and CT-arthrography are necessary for the diagnosis of labrum acetabulare lesions.