Peroneus quartus muscle

Case contributed by Ammar Haouimi
Diagnosis almost certain

Presentation

Incidental finding.

Patient Data

Age: 35 years
Gender: Male
mri

There is a supernumerary myotendinous structure within the peroneus tendon sheath that descends posterior and medial to the peroneal tendons with distal insertion in the retrotrochlear eminence of the calcaneus.

Case Discussion

MRI features of a peroneus quartus accessory muscle.

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