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Insufficiency fracture. A 40-year-old male with a pelvic insufficiency fracture. Radiograph (a) demonstrates an expansile osseous lesion with periosteal reaction and maturing callus along the left superior pubic ramus (arrow). No definite fracture line is identified. Coronal STIR (b) of the pelvis demonstrates bone marrow edema throughout the left superior pubic ramus, fracture site, and surrounding callus (arrow). B: bladder.
