Reason: evaluate medial compartment- evaluate for chondral injury vs meniscus tear History: left knee pain MENISCI: There is deformity of the medial meniscus. The posterior horn of the medial meniscus appears unusually small with a radial tear noted just medial to its root. The contour of the anterior horn is abnormal with portions appearing square-shaped in sagittal cross-section, perhaps representing an adherent displaced meniscal fragment. There is increased signal intensity within the body of the medial meniscus indicating intrasubstance degeneration. The lateral meniscus is intact.ARTICULAR CARTILAGE AND BONE: There is severe osteoarthritis of the medial tibiofemoral compartment with full-thickness cartilage loss along the weightbearing portions of the medial femoral condyle and medial tibial plateau with degenerative subchondral changes in the underlying marrow. The lateral compartment is preserved. There is near full-thickness degeneration of the articular cartilage of the patella along the lateral facet with blistering of the articular cartilage at the median eminence. Relatively mild degeneration is seen along the medial facet of the patella. There is also full-thickness cartilage loss and delamination along the medial facet of the trochlea. Note is made of a bipartite patella.LIGAMENTS: The cruciate and collateral ligaments are intact.EXTENSOR MECHANISM: The patellar and quadriceps tendons appear intact. There is patella alta. There is ossification of the distal patellar tendon at its tibial attachment, which is not necessarily of any clinical significance.ADDITIONAL
Severe osteoarthritis predominantly affecting the medial tibiofemoral compartment with deformity of the medial meniscus likely representing a complex tear with displaced meniscal fragment. Other findings as above.