Peroneus Brevis Tendinitis Etiology / Epidemiology / Natural History
May occur in long distance runners
Peroneus Brevis Tendinitis Anatomy
Most common location for longitudinal tears in the peroneus brevis is at the fibular groove (Sammarco GJ, Foot Ankle 9:163;1989)
Superior peroneal retinaculum: primary retaining structure for the perneal tendons. Origin: posterior margin of the distal 1-2cm of the fibula. Travels posteriorly to the lateral calcaneus with extensions into the paratenon of the Achilles tendon. Most commonly avulses from the fibula often with a small fleck of bone. (Maffuli N, AJSM 2006;34:986).
Deficient posterior distal fibular groove may contibute to peroneal instability. Approximately 25% of people have a flattened or convex peroneal groove.
Hindfoot varus alignment is a predisposition to peroneal tendon injury.
Os peroneum is a sesamoid bone present in 10% to 20% of people located along the peroneus longus near the peroneal groove of the cuboid. (Sobel M, Foot Ankle Int 1994;15:112)
Peroneus Brevis Tendinitis Clinical Evaluation
Palpable tenderness posterior to the lateral malleolus may be indicative of injury to the peroneal tendons.