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Fig. 8A. —Type III superior peroneal retinacular injury in 48-year-old woman with history of chronic peroneal tendon instability. Axial T1-weighted image (TR/TE, 800/20) depicts focal defect in distal fibula (straight long arrow) consistent with avulsion fracture. Avulsed cortical fragment is not visualized. Superior peroneal retinaculum (open arrow) is thickened and disrupted. Peroneus brevis and peroneus longus tendons (curved arrows) are in normal position. Tear of peroneus brevis was suspected.