Left knee pain, swelling, instability. MENISCI: There is a partial thickness radial tear of the posterior horn of the medial meniscus involving the inner half of the horn. There is globular intrasubstance signal within the body of the medial meniscus indicating intrasubstance degeneration. The anterior horn of the medial meniscus appears intact. There is mild intrasubstance degeneration of the lateral meniscus but no lateral meniscal tear.ARTICULAR CARTILAGE AND BONE: There is mild focal degeneration of the articular cartilage of the lateral facet of the patella. There is moderate degeneration of the articular cartilage of the medial facet of the trochlea with small subchondral cysts. There is a full-thickness defect of the articular cartilage of the weightbearing portion of the medial femoral condyle just above the torn posterior horn of the medial meniscus that measures just over 1 cm in AP dimension. There is mild edema-type signal within the posterior aspect of the medial tibial plateau that is likely degenerative in etiology. The articular cartilage of the lateral tibiofemoral compartment appears relatively intact.LIGAMENTS: The cruciate and collateral ligaments appear intact. EXTENSOR MECHANISM: The extensor mechanism appears intact. ADDITIONAL
1.Partial thickness radial tear of the posterior horn of the medial meniscus.2.Articular cartilage degeneration and other findings as described above.