Ankle pain TENDONS: No significant abnormality noted.LIGAMENTS: The anterior talofibular ligament is indistinct perhaps reflecting prior injury. The remaining ligamentous structures of the ankle appear intact.ARTICULAR SURFACES AND BONE: There is curvilinear low signal intensity within the head and dome of the talus compatible with avascular necrosis. There is adjacent edema within the head and neck of the talus presumably representing extension/progression of AVN. There is no articular surface collapse of the talus and the articular cartilage of the talar dome is intact.There is mild nonspecific marrow edema of the navicular. A subcentimeter collection of fluid is noted dorsal to the navicular which may represent a small ganglion. There is a small tibiotalar joint effusion with additional fluid extending medially and laterally from the talonavicular joint.ADDITIONAL
Avascular necrosis of the talus with other findings described above.