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

Figure 3

60-year-old female ultrasonography of the long axis of the peroneus longus tendon. (a) Right foot: complaint side demonstrating a thickened and heterogeneous peroneus longus tendon (asterisk) and irregular and fragmented os peroneum, associated with swelling of the surrounding soft tissues. (b) Left foot: contralateral side for comparison, demonstrating a preserved echotexture of the peroneus longus tendon (asterisk) and regular contours of the os peroneum without changes in the surrounding soft tissues.

(a)

(b)