Chronic Lateral Ankle Pain Secondary to an Anomalous Peroneus Longus

Abstract not available. Introduction provided instead.

The differential for chronic lateral ankle pain is broad and includes lateral ankle instability, subtalar instability, tarsal coalition, peroneal tendon subluxation, peroneal tendon rupture, longitudinal peroneal tendon tear, peroneal tendonitis, tenosynovitis, and lumbosacral radiculopathy. Disorders of the peroneal tendons have seldom been reported. Although peroneus brevis disorders have been described more often in the literature, peroneus longus problems are gaining more recent attention.¹ Much of the literature regarding both tendons is in the form of case reports.^2-4 Tenosynovitis, longitudinal ruptures or partial tears of the peroneus longus tendon, and pathologic changes isolated to the os peroneum are the major pathologic conditions associated with the peroneus longus.¹