18 year-old female with foot and ankle pain TENDONS: The extensor and flexor tendons are intact. The Achilles tendon appears within normal limits.LIGAMENTS: The medial and lateral collateral ligaments are intact. The ATFL is intact.ARTICULAR SURFACES AND BONE: There is edema surrounding the posterior subtalar joint, more extensive within the talus than in the calcaneus. There is widening of the talonavicular articulation, without significant adjacent bone marrow edema. No fibrous or osseous coalition is evident. Subchondral reactive bone marrow signal is noted along the tibiotalar joint. No fracture is visualized.ADDITIONAL
Bone marrow edema on both aspects of the posterior subtalar joint, raising the question of abnormal mechanics. No evidence of fibrous or osseous coalition.