A and B, Radiographs of patient with tear of peroneus longus and retraction of sesamoid bone (os peroneum). C, T2-weighted MRI of type I tear of both peroneus longus and peroneus brevis tendons. Peroneus brevis disease was best seen at inferior aspect of lateral malleolus, and peroneus longus disease was best seen at lateral border of foot near cuboid groove.