PMC4300884_01
Anteroposterior X-ray showing osteophyte at junction of L5-S1 on right side (arrow).
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X-ray (Fig. 1) and computed tomography (CT) scan (Fig. 2) of his lumbar spine showed a large anterior osteophyte at L5-S1 that appeared to contact the sacral ala.
A 3D model created from CT scans accurately portrayed the location and size of the osteophyte.
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The resected osteophyte correlated closely to a 3-dimensional (3D) model reconstruction (prepared courtesy of DePuy Spine, Raynham, Massachusetts) used for further interpretation of the anatomy from the patient's CT scan (Fig. 3).