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Added by Christian Veillette , last edited by Christian Veillette on Sep 06, 2008  (view change)
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Location Knee
Diagnosis Discoid Meniscus
Discussion Seen on sagittal images, the bow-tie 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 is indicative of a discoid meniscus.
Reference Araki Y, Yamamoto H, Nakamura H, Tsukaguchi I: MR diagnosis of discoid lateral menisci of the knee. Eur J Radiol 1994 May;18(2):92-5.

Silverman JM, Mink JH, Deutsch AL: Discoid menisci of the knee: MR imaging appearance. Radiology 1989 Nov;173(2):351-4.
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