Root tear of medial meniscus
Osteoarthritis of knee joint with recent fall.
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Osteoarthritis of knee joint noted with focal cartilage thinning at under-surface of patella consistent with chondromalacia. The medial meniscus reveals a horizontal tear through the body and posterior horn, outward extrusion, posterior root tear, and partial meniscofemoral separation due to partial tears of its deep fibres. Myotendinous edema at popliteus and femoral attachment of lateral collateral ligament is evident. Small Baker's cyst is seen.
The cruciate ligaments are intact, and lateral meniscus is normal.
Root tear of medial meniscus with grade 4 chondromalacia patellae and osteoarthritic changes at left knee joint.