Multiple bone infarcts in are seen distal femur (involving both femoral condyles and anterior intercondylar region), proximal tibia (involving both tibial condyles) and in patella. Surrounding marrow oedema is seen in medial aspect of distal femur and in patella.
Double-line sign is seen on T2 images with hyperintense inner ring of granulation tissue and a hypointense outer ring of sclerosis.
Mild marrow oedema is seen in proximal fibula.
Full thickness fissuring of articular cartilage is seen along medial articular facet of patella.