Discoid Meniscus

Approximately 1.5%-3 % of the population have a discoid lateral meniscus. These congenital variants are prone to tears. Discoid meniscus is diagnosed if there is continuity of the anterior and posterior horns of the meniscus on three or more consecutive sagittal images (4-mm slices), there is loss of the normal semilunar morphology and greater than 50% coverage of the lateral tibial plateau by the meniscus. 

A discoid meniscus will often be asymptomatic but may cause mechanical symptoms such as pain, giving way, an effusion, and a clicking or snapping knee. Surgery to excise the central portion of a discoid meniscus can be done arthroscopically. 

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See also in sourсe #XX -- [ ]

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