Paralabral cyst

What is a paralabral cyst, and what is its clinical significance?

A paralabral cyst can form around the labrum from extrusion of synovial fluid through a labral tear with a one-way ball-valve mechanism. A cystic structure around or extending from the labrum that is very closely associated with a labral tear is the major finding and should be suspected even if a labral tear is not clearly identified. Furthermore, the exact location of the paralabral cyst must be defined because it can often be the cause of a nerve impingement syndrome.

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