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An example of a case with asymptomatic pseudoarthrosis. (A) Preoperative magnetic resonance imaging showing stenosis C3–7, (B) preoperative lateral plain radiography, (C) lateral X-ray picture directly postoperatively, 28 mm in flexion (D) and 25 mm in extension (E) X-rays 2 years postoperatively showing absent bony bridging and more than 1-mm motion between the spinous processes. However, the patient was asymptomatic with no need for revision surgery.
