Basics and mimics of Double Posterior Cruciate Ligament (PCL) sign
Journal Title: Saudi Journal of Medicine - Year 2016, Vol 1, Issue 2
Abstract
Abstract: The double posterior cruciate ligament (PCL) sign is characteristic MRI sign of bucket handle tear of medial meniscus in patients with theintact anterior cruciate ligament. Bucket handle tear is displaced vertical longitudinal tear with displacement of theinner fragment (resembling the handle of a bucket) into intercondylar notch parallel to posterior cruciate ligament with residual larger peripheral part of the meniscus resembling the bucket. On MRI, thedouble posterior cruciate ligament (PCL) sign is seen as a low-signal-intensity band that is parallel and anteroinferior to the PCL on sagittal images. Double PCL sign is a highly specific indicator of bucket-handle tear of themedial meniscus. However, knowledge of mimics of this sign which include few normal and abnormal structures in the intercondylar fossa, such as meniscomeniscal ligaments, ligament of Humphrey and Wrisberg (accessory meniscofemoral ligaments), loose bodies, fracture fragments, double-barrelled PCLis important to avoid fallacies. Primary treatment of bucket handle tear is arthroscopic repair. Keywords: PCL (Posterior cruciate ligament), ACL (Anterior cruciate ligament), bucket handle tear, medial meniscus.
Authors and Affiliations
Virender Kumar, Mamta Singhroha
Keywords
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