-
medial compartment:
- 12 mm crescentic hypointensity of subchondral bone, consistent with insufficiency fracture with minimal collapse
- overlying hyaline cartilage appears flattened, but intact
- normal meniscus
-
lateral compartment:
- normal cartilage
- normal meniscus
-
patellofemoral compartment:
- full-thickness chondrosis of central trochlea (best seen on axial), with possible 9 mm loose body posterior to ACL within intercondylar notch (best seen on sagittal T2)
- normal patellar cartilage
-
other:
- small knee joint effusion and small Baker's cyst
- marked thickening of lateral patellofemoral ligament, suggestive of chronic sprain
- extensive superficial anterior edema/bursitis
- cruciate and collateral ligaments intact