Arcuate ligament

Last revised by Dr Henry Knipe on 18 Jul 2017

The arcuate ligament is part of the posterolateral ligamentous complex of the knee that is variably present, being found in ~65% (range 47.9-71%) of knees. It is a Y-shaped thickening of the posterolateral capsule, which arises from the fibular styloid and divides into two limbs:

In individuals with a large fabella, the arcuate ligament may be absent replaced by a thick fabellofibular ligament.

See also

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Cases and figures

  • Posterior knee anatomy (illustrations)
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