At the lateral calcaneus the inferior peroneal retinaculum covers both tendons.
Dor-sal of this groove both peroneal tendons run distally and are covered by the superior peroneal retinaculum which holds the tendons in place to reduce tendon excursions and prevent the tendons to dislocate .
A fracture of the posterolateral margin of the fibula is a rare finding but indicates disruption of the peroneal retinaculum
. (36) MRI provides the best imaging for peroneal tendons and the stabilizing retinaculum, although a CT scan can provide detailed bony anatomy when subtle fractures are suspected or additional evaluation is needed.
Other anatomical abnormalities that can predispose a patient to peroneal tendon tears include an abnormal superior peroneal retinaculum attachment (which can lead to recurrent subluxation or dislocation), a mass causing compression along the course of the tendons, and anomalous muscles (such as a peroneus quartus).
MRI features of chronic injuries of the superior peroneal retinaculum. AJR Am J Roentgenol.
(65) Sobel investigated disruption of the superior peroneal retinaculum
, which restrains the peroneal tendons in their groove behind the ankle.
We describe a technique for the reconstruction of the superior peroneal retinaculum using anchors.
(1) The primary restraint to tendon subluxation is the superior peroneal retinaculum. This fibrous band originates on the posterolateral aspect of the fibula and inserts onto the lateral surface of the calcaneus.