Acetabular labrum ossification is not common and I have been able to find only a few reports on it. The cases we have seen mostly have an underlying dysplastic, elongated labrum however there are reports of it occurring in a normal labrum. So what does it look like? Having learnt the hard way by missing them by looking only at the MRI, I find the best place to start is with the plain X-ray as it can be overlooked if assessing just the MRI.
Image 2 Above: Bilateral labral ossification in the same patient. Labrum is diffusely ossified. Ossification follows the shape of the labrum. MRI below.
Image 3 Above: MRI for patient in Image 2. On the PD and PDFS scans ossification follows same signal as adjacent bone. Labrum is elongated and dysplastic.
Image 4 above: PD and PDFS ossification of the labrum centered on the labrum and follows labrum shape. Different patient to Image 2 and 3.
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