Posterior cruciate ligament injury
Locking of knee with difficulty in climbing and walking.
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Swollen up posterior cruciate ligament with intrasubstance PD, T2 and STIR hyperintense signals along the direction of the fibres with preserved alignment. No other internal derangement.
Encountering a posterior cruciate ligament injury is not a daily routine unless you are a sports radiologist. Accounting for approximately 10% of knee injuries, this is an example of a contused posterior cruciate ligament with disruption of few of the internal fibres while the ligament per se remains intact. No secondary signs of tibial translation or any bone marrow changes seen in this case.