Male 28 years old; Reason: instability ankle History: pain and swelling TENDONS: A small amount of circumferential fluid is noted around the posterior tibial tendon, which may conceivably represent mild tenosynovitis, however this is equivocal. Best seen on the axial T2 sequence, there is fluid signal around the peroneus tendons as they courses below the fibular tip. The peroneus brevis tendon appears attenuated at this level, suggestive of chronic attritional tearing. The peroneus longus tendon appears disrupted at its surface, likely representing a longitudinal split tear.LIGAMENTS: The talofibular and calcaneofibular ligaments are intact. The visible fibers of the deltoid ligament are intact.ARTICULAR SURFACES AND BONE: There appears to be a mild pes cavus deformity, as suggested on the prior radiographs. The bone marrow signal is normal. No osteochondral lesion is identified. ADDITIONAL
1. Findings suggestive of a longitudinal split tear of the peroneus longus tendon and possible chronic attritional tearing of the peroneus brevis tendon as they course below the fibular tip.2. Other findings as described above.