Figure 8.

Proximal diaphyseal fatigue fracture of the tibia in a 20-year-old man with a history of regular jogging. (a) Lateral radiograph shows no obvious fracture lines but a subtle localized medial tibial cortex periosteal reaction (arrows). (b) Sagittal reformatted CT image acquired 1-month after the radiograph shows a linear hypoattenuation in the tibial cortex (arrowhead), as well as obvious periosteal thickening (arrows). (c) Sagittal T2-weighted fat-saturated image acquired the same day shows an area of hyperintensity spreading over the proximal tibia (arrows), which is consistent with the presence of proximal tibial fracture.