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Pitfalls in imaging and diagnosis of new bone formation: DISH. a Sagittal T1-weighted MR image and (b) computed tomography (CT) show hyperproliferative ossification of the anterior longitudinal ligament, resulting in bulky horizontally oriented osteophytes (arrows) with—in this case—an average growth angle of > 45° from vertical. c, d Semicoronal T1-weighted MR images show bridging ossification (arrows) at the anterior and superior aspect of the sacroiliac joints
