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KMID : 0858520160200030191
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Journal of the Korean Society of Magnetic Resonance in Medicine
2016 Volume.20 No. 3 p.191 ~ p.195
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Displaced Double-Layered Lateral Meniscus That Mimicked the Bucket-Handle Tear: a Case Report
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Kwak Min-Jee
Kim Sun-Ki
Kim Ki-Jun
Lee Bum-Sik
Kang Jun
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Abstract
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Among the various types of congenital meniscal anomalies, the double-layered lateral meniscus is extremely rare. The double-layered meniscus consists of both the upper additional and the lower normal meniscus. As the upper additional meniscus is mobile, it can be easily displaced, while the lower lateral meniscus is usually normal in shape and volume. A 42-year-old woman suffering from pain and locking of her left knee underwent Magnetic resonance imaging (MRI) examination and an arthroscopic surgery. A rare meniscal abnormality was seen in her left knee, which presented as a double-layered lateral meniscus with displacement. It was remarkable that the upper additional meniscus was displaced over the intercondylar eminence of the tibia and it mimicked a bucket-handle tear. Even though it is rare, it is necessary to consider the possibility of displaced double-layered meniscus in the differential diagnosis of a bucket-handle tear. Here, we report the MRI and arthroscopic findings of a displaced double-layered lateral meniscus, which was similar to the bucket-handle tear.
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KEYWORD
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Double-layered lateral meniscus, Bucket-handle tear, Knee
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