Anterolateral ankle pain TENDONS: There is longitudinal split tearing of the peroneus longus at and distal to the peroneal tubercle. The remaining tendinous structures appear intact.LIGAMENTS: The lateral collateral ligament complex and the distal syndesmotic complex are intact. There is loss of the normal fatty striations of the deep fibers of the deltoid which may reflect prior sprain; however the deltoid ligament complex otherwise appears intact.ARTICULAR SURFACES AND BONE: There is a nondisplaced fracture of the base of the anterior process of the calcaneus with edema in the adjacent marrow. There is low signal intensity along the fracture margin suggesting it is subacute in nature. The anterior process of the calcaneus also appears prominent and closely approaches the lateral margin of the navicular raising the question of a nonosseous coalition. There is a small subtalar effusion. There is mild osteoarthritis of the tibiotalar joint and talonavicular joints but there is no evidence of an osteochondral defect. Additional osteoarthritic changes are seen in the midfoot and tarsometatarsal joints. A tiny amount of fluid signal is seen dorsal to the head of the talus which may represent a synovial cyst or ganglion.ADDITIONAL
1. Nondisplaced fracture through the base of the anterior process of the calcaneus with possible nonosseous calcaneonavicular coalition.2. Osteoarthritis of the ankle and foot as described above without evidence of focal osteochondral defect.3. Longitudinal split tearing of the peroneus longus which is of questionable clinical significance.4. Additional findings described above.