Why the study?
LCEA is an unreliable sole marker for adult hip dysplasia, and unlike frank dysplasia where PAO is supported, there is no preferred treatment for patients with borderline hip dysplasia.
The lateral center edge angle (LCEA) is an unreliable sole marker for adult hip dysplasia, and treatment strategies must be individualized, especially for borderline cases.
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LCEA alone insufficient for borderline dysplasia decisions; leaves open need for validated individualized algorithms.
Adult hip dysplasia is most commonly diagnosed based on the LCEA; however, the LCEA is an unreliable sole marker for dysplasia, and additional radiographic parameters should be utilized. Furthermore, specific pathology identified on imaging and/or during hip arthroscopy can provide clues to a surgeon when the diagnosis is inconclusive according to history and physical examination alone. While the data support that patients with frank dysplasia are best treated with PAO, there is no such preferred treatment for patients with BHD, who have a wide spectrum of instability. Selective use of arthroscopic labral and capsular treatment alone may provide good results in carefully chosen patients with BHD, while some may end up requiring a bony realignment procedure.
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Kraeutler et al. (2019) studied this question.
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