Painful Os Peroneum Syndrome: Underdiagnosed Condition in the Lateral Midfoot Pain

Figure 2

60-year-old female right midfoot MRI. (a) Sagittal T2; (b) coronal T1; (c) fat suppressed T1 postgadolinium; and (d) axial fat suppressed T1 postgadolinium. Arrows show the os peroneum within the peroneal tendon, with irregular contours, bone marrow edema, and intense enhancement of the adjacent soft tissues, characterizing inflammatory changes. The peroneus longus tendon is thickened and heterogeneous, consistent with associated tendinopathy.

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