18-year-old male with injury, unable to bear weight and swelling. Evaluate for ligament/tendon injury TENDONS: The peroneal, flexor and extensor tendons are intact.LIGAMENTS: There is thickening of the anterior talofibular ligament with full thickness disruption at its talar attachment. There is also abnormal thickening of the calcaneofibular ligament indicating at least a sprain; the calcaneal attachment is somewhat ill-defined and we cannot exclude the possibility of a ligament avulsion. The posterior talofibular ligament is intact. The tibiofibular syndesmotic complex is intact. There is perhaps mild edema in the deep fibers of the deltoid ligament which could represent a mild sprain, however this is equivocal.ARTICULAR SURFACES AND BONE: We see no osteochondral defect. There is a small tibiotalar and subtalar joint effusion. Focal marrow signal abnormality just below the angle of Gissane likely represents a vascular remnant. There is a cystic lesion just inferior to this which may represent a small simple bone cyst, but is of doubtful clinical significance.ADDITIONAL
Tear of the anterior talofibular ligament and tear/sprain of the calcaneofibular ligament and other findings as described above. The tendons are intact.