65-year-old male, sore and thickened. Suspected partial complete left acute Achilles tendon. TENDONS: There is marked thickening of the Achilles tendon, most pronounced approximately 5 cm proximal to its insertion on the calcaneus tuberosity with associated intrasubstance intermediate signal intensity on T1, STIR and T2-weighted images coursing longitudinally along the tendinous fibers most compatible with a longitudinal split tear with internal fluid; there is no transverse component. There is mild edema within the peritendinous region. The remaining tendons of the ankle are intact.LIGAMENTS: No significant abnormality noted.ARTICULAR SURFACES AND BONE: Oval/round structure within the posterior process of the talus which demonstrates low signal intensity on T1 and right signal on T2-weighted images most compatible with a small cyst. Otherwise no significant abnormalities noted.ADDITIONAL
Findings are most compatible with a longitudinal split tear of the Achilles tendon with internal fluid. There is associated mild peritendinous edema.