Displaced Double-Layered Lateral Meniscus That Mimicked the Bucket-Handle Tear: a Case Report

Abstract

Various different types of meniscal abnormalities have been reported in the literature. Among them, the occurrence of a double-layered lateral meniscus is extremely rare. The double-layered lateral meniscus includes both the upper additional and the lower normal meniscus (1) (Fig. 1). As the upper additional meniscus is mobile, although very rare, it can be displaced and flipped over the intercondylar eminence of tibia, mimicking the bucket-handle tear. In the English literature, there is only one previously published report of a displaced double-layered lateral meniscus that mimicked the bucket-handle tear (2). Here, we describe a rare case of displaced double-layered lateral meniscus mimicking the bucket-handle tear, where a displaced upper additional meniscus was observed in the intercondylar notch of the knee. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Received: August 11, 2016 Revised: September 11, 2016 Accepted: September 12, 2016