Clinical and radiologic evaluation of the posterior cruciate ligament-injured knee
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Purpose of review
Accurate isolated PCL diagnosis continues to present a challenge. This article reviews the current literature regarding clinical and radiographic evaluation of PCL injuries.
A thorough history to understand the mechanism of injury should begin any evaluation. Several clinical tests have been shown to effectively assess PCL laxity, with the posterior drawer test possessing the highest sensitivity and specificity. Any thorough exam should compare the contralateral, uninjured leg. If a PCL or multi-ligament injury is suspected, plain radiographs should be performed to avoid missing a fracture or avulsion. An MRI represents the current gold standard for diagnosing ligament injuries in the knee and should always be obtained in these cases. Due to the significant incidence of nerve injuries (25%) and vascular injuries (18%) with knee dislocations, any suspicion of neurovascular compromise necessitates further studies.
A combination of a thorough clinical history and examination, followed by appropriate imaging optimizes PCL and multi-ligament injury evaluation.
KeywordsIsolated posterior cruciate ligament Multi-ligament Clinical radiographic evaluation
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
Human and animal rights and informed consent
This article does not contain any studies with human or animal subjects performed by any of the authors.
Papers of particular interest, published recently, have been highlighted as: • Of importance
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