This is a type of ankle injury to the talus bone, which is the bone at the bottom of the ankle joint, and usually involves both the talus bone and the overlying cartilage. It may include bruising/contusion of the ankle cartilage layers, fracture of the ankle cartilage and bone layers, or cyst-like lesions within the ankle bone underlying the surrounding ankle cartilage.
When conservative treatment fails, a surgical treatment may be recommended. The goals of ankle surgery are to restore the normal shape and gliding surface of the talus to re-establish normal mechanics and joint forces.
Surgery may be done arthroscopically depending on the size or location of the lesion. Treatments include debridement (removing injured cartilage and bone), fixation of the injured fragment, micro-fracture or drilling the lesion, and/or transfer or grafting of the ankle bone and/or cartilage.