63-year-old female with ankle pain, chronic posterior tibial insufficiency. TENDONS: There is increased linear fluid signal abnormality within the peroneus longus tendon consistent with a interstitial/longitudinal split tear. There is increased linear signal abnormality within the distal Achilles tendon consistent with an interstitial/longitudinal split tear. The flexor and extensor tendons appear intact.LIGAMENTS: The lateral collateral ligament complex appears intact. The distal tibiofibular syndesmotic complex appears intact. The visualized portions of the deltoid ligament appear intact.ARTICULAR SURFACES AND BONE: There is narrowing of the subtalar joint with subchondral cyst formation within the calcaneus, likely degenerative in etiology. Otherwise no bone marrow signal abnormality is identified.ADDITIONAL
1. Interstitial tearing of the Achilles tendon.2. Interstitial tearing of the peroneus longus tendon.3. Degenerative changes and other findings as described above. 