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Fig. 14A. —63-year-old woman treated with radiation therapy for stage IIA cervical cancer 25 years earlier; she had been involved in motor vehicle accident 1 month before imaging and sustained known pubic fracture. Axial T1-weighted MR images of pelvis before (A) and after (B) administration of gadolinium show abnormal signal in right pubis (solid arrow), which biopsy results confirmed to be radioosteonecrosis. Note hematoma located posteriorly (open arrow).