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. 2022 Aug 5;52(5):855–874. doi: 10.1007/s00256-022-04139-w

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© The Author(s), under exclusive licence to International Skeletal Society (ISS) 2022, Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.

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Fig. 1 — Normal pre-MRI right hip injection in a 32-year-old female referred for possible labral tear. AP fluoroscopic image shows contrast opacifying the normal joint capsule. A prominent zona orbicularis, or annular ligament, is identified, causing a normal constriction at the proximal femoral head-neck junction (arrows)