Plantar rupture of peroneus longus tendon

Case contributed by Dr Chris O'Donnell

Presentation

Acute inversion injury to the left ankle. Now severe left ankle and hind foot pain laterally.

Patient Data

Age: 35
Gender: Male
Modality: MRI

Defect in peroneus longus in the midfoot (arrow).  Tendon has retracted with the residual tendon attached to the 1st metatarsal base (arrow).  Torn end of the tendon is swollen and contains increased signal as does the distal end.

Case Discussion

Peroneus longus tendon tears in general are longitudonal with the majority of fibres intact. 

Transverse rupture is rare and occurs at 3 locations ie: tip of the malleouls 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.  There is often an asscoiated os peroneum but not seen in this case.  This patient is young thus unlikely to be degenerative, rather due to acute trauma.

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Case Information

rID: 43054
Case created: 21st Feb 2016
Last edited: 19th Apr 2017
Inclusion in quiz mode: Included

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