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Sports Medicine
intermediate
X-Type

Discoid Lateral Meniscus

Meniscal Pathology

An 8-year-old girl presents with lateral knee pain and an audible "clunk" or "snap" with knee flexion-extension for 6 months. Her parents note she walks with the knee slightly flexed. Examination reveals a palpable snap over the lateral joint line during flexion, mild effusion, and terminal flexion loss. MRI shows a thickened, discoid-shaped lateral meniscus with abnormal signal extending to the articular surface and evidence of peripheral instability. Regarding discoid lateral meniscus:

Mark each as TRUE or FALSE

A

Discoid meniscus is a congenital variant where the meniscus is thickened and disc-shaped rather than...

B

The Watanabe classification describes three types: Type I (incomplete - covers less than 80% of late...

C

Discoid meniscus most commonly affects the medial meniscus; it is an acquired condition; the Watanab...

D

Clinical features include lateral knee pain, mechanical symptoms (clicking, locking, snapping), effu...

E

Treatment: asymptomatic stable discoid meniscus requires no treatment; symptomatic cases are managed...

Answer the questions to see explanations

Click T (True) or F (False) for each option