Reason: evaluate for meniscal tear, evaluate ligaments History: patient with knee popping and knee giving out, grinding heard as well, no OA seen on XR.. MENISCI: There is complex multidirectional tearing of the posterior body and posterior horn of the medial meniscus including horizontal and vertical components that extend to the tibial and femoral articular surfaces.There is globular intrasubstance intermediate signal throughout the lateral meniscus compatible with degeneration without discrete tear. ARTICULAR CARTILAGE AND BONE: There is partial-thickness defect of the articular cartilage of the weightbearing portion of the lateral tibial plateau measuring 9 mm in AP dimension. The articular cartilage of the lateral tibiofemoral compartment is otherwise intact.The articular cartilage of the medial tibial femoral compartment is intact.There is severe thinning of the articular cartilage of the patella with foci of full-thickness defects with underlying bone marrow edema and subchondral cyst formation. Small focus of full-thickness defect involving the medial trochlea with underlying bone marrow edema. Tricompartmental osteophytes.LIGAMENTS: The cruciate and collateral ligaments are intact.EXTENSOR MECHANISM: The extensor mechanism is intact.ADDITIONAL
1.Complex degenerative tearing of the medial meniscus as described above. Degeneration of the lateral meniscus without discrete tear.2.Partial and full-thickness defects of the articular cartilage as described above.3.Moderate joint effusion.4.Small Baker's cyst.5.Nonspecific edema within the infrapatellar subcutaneous fat.