Peroneus brevis tendon rupture with tophaceous gout infiltration.

The authors present a patient with a history of chronic lateral ankle instability and pain. Physical and diagnostic evaluation revealed anterior ankle instability and peroneus brevis weakness. An MRI showed an attenuated anterior-talofibular ligament and a longitudinal tear of the peroneus brevis tendon. Surgical exploration exhibited tophaceous gout within the tear of the peroneus brevis as well as within the attenuated anterior-talofibular ligament. Presented is an unusual case of a longitudinal tear of the peroneus brevis tendon with tophaceous gout infiltration.