A 76-year-old woman with peroneal tendinopathy and split tear of the peroneus brevis.Short-axis view of the peroneal tendons at the retromalleolar level shows enlarged peroneal tendons with a longitudinal split tear gap (arrow) at the peroneus brevis tendon, which is pushed anteriorly by the peroneus longus tendon toward the lateral malleolus. PB, peroneus brevis tendon; PL, peroneus longus tendon.