Bow Tie Sign

A sign seen on sagittal images, the bowtie represents the continuity of the meniscus between the anterior and posterior horns. It is normally seen on 2 contiguous sagittal images. When it is seen on 3 or more contiguous 5-mm thick sagittal images, it is indicative of a discoid meniscus
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The absent bow tie sign in bucket-handle tears of the menisci in the knee.