Chronic ankle pain. Sagittal PD fat sat and coronal PD.

Nice example of osteochondral injury involving the cartilage tidemark. There are multiple subchondral cysts, and bone oedema. This is quite classic of inversion injuries, with impaction injury between the talus and distal tibia. The important thing, of course, is to make sure that there is no detached osteochondral fragment. For that, follow the cartilage lining from end to end, and the overlying cortex. Make sure there are no cortical disruptions.