Os trigonum with marrow oedema across and within the synchondrosis. Mild posterolateral ankle joint capsule thickening and oedema. Small effusion of the subtalar joint. Small tendon sheath effusion of flexor hallucis longus adjacent to the os trigonum.
Loculated ganglion cysts arising laterally from the posterior subtalar joint adjacent to the lateral talar shelf / lateral calcaneum and peroneal tendons.
Upward bowing of the dorsal talonavicular ligament secondary to a talonavicular joint effusion, extends laterally into the sinus tarsi. Further effusion from the posterior subtalar joint extends anteriorly into the sinus tarsi.
Incidental unicameral bone cyst within the plantar aspect of the mid calcaneal body.