Peroneus brevis tendon tear - boomerang sign

Case contributed by Dr Henry Knipe

Presentation

Lateral ankle pain.

Patient Data

Age: 50 years
Gender: Female

Longitudinal split tear of peroneus brevis in the retromalleolar groove, which is wrapped partially around an intact peroneus longus tendon (boomerang sign). Small peroneal tendon sheath effusion. Incidental peroneus quartus. 

Case Discussion

Peroneus brevis tendon tears can be acute or chronic, and may be asymptomatic or associated with lateral ankle pain and/or instability.

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