Presentation
Acute inversion injury to the left ankle. Now severe left ankle and hindfoot pain laterally.
Patient Data
Defect in peroneus longus in the midfoot (arrow). Tendon has retracted with the residual tendon attached to the 1st metatarsal base (arrow). The torn end of the tendon is swollen and contains an increased signal as does the distal end.
Case Discussion
Peroneus longus tendon tears can be longitudinal or transverse. Transverse rupture is rare and can occur at three locations: the tip of the malleolus to the peroneal tubercle, peroneal tubercle to the inferior retinaculum and from the retinaculum to the cuboid notch. This is an example of the latter with proximal tendon retraction. An os peroneum is not seen in this case. This patient is young thus unlikely to be degenerative, rather due to acute trauma.