Insufficiency fractures in the same patient as in Figure 8. Axial T1-weighted MR images obtained 3 years after the end of treatment show insufficiency fractures of the sacrum and ilium (arrows in a) and pubic rami (arrow in b), the most commonly affected sites. The fractures are seen as hypointense lines. Nonunion is a common complication of pubic ramus fractures.

Figure 16a.

Figure 16b.