Reason: Patient with persistent non-traumatic left ankle pain. Please identify potential causes (fracture, injury to ligaments). History: Left ankle pain. TENDONS: The flexor and extensor tendons appear intact. The peroneal tendons appear intact. There is a lobulated fluid signal intensity within the tendon sheath of the peroneus longus tendon indicating a tenosynovitis. The Achilles tendon is normal in appearance.LIGAMENTS: The distal tibiofibular syndesmotic complex appears intact. There is disruption of the ATFL. The PTFL and calcaneofibular ligaments appear intact. The imaged components of the deltoid ligament appear intact.ARTICULAR SURFACES AND BONE: There is subchondral cyst formation within the second cuneiform likely degenerative in etiology. There is bone marrow signal abnormality within the lateral aspect of the talar dome.ADDITIONAL
1. Disruption of the ATFL.2. Bone marrow signal abnormality in the lateral aspect of the talar dome likely representing degenerative changes/subchondral cyst formation, although this could represent a chronic osteochondral defect. Other findings as described.3. Tenosynovitis of the peroneus longus tendon.