Figure 12. Typical stress fracture of the medial malleolus. (a) Short tau inversion recovery coronal image showing focal increase signal at the base of the medial malleolus surrounding a small focal low signal lesion extending to the articular surface (arrow). (b) Axial T1 weighted image showing the linear fracture line (arrows). (c) Corresponding CT slice confirms the sclerotic fracture line (arrows).