Anterior root attachment tear - medial meniscus

Case contributed by Dr Henry Knipe

Presentation

Traumatic left knee injury, now with pain.

Patient Data

Age: 40 years

Partial extrusion of the anteromedial medial meniscus with a radial tear of the anterior attachment; adjacent small parameniscal cyst formation and localized edema of Hoffa's fat pad. Lateral meniscus is intact.

Cruciate and collateral ligaments are intact. 

Medial compartment partial thinning and full-thickness fissuring. 

Case Discussion

Meniscal root attachments typically have a striated appearance, however, in this case, there is a clear fluid signal cleft indicating a tear with secondary signs including partial body extrusion, parameniscal cyst and Hoffa fat pad edema. 

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