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The Journal of Bone & Joint Surgery British Volume
Vol. 81-B, Issue 4 | Pages 747 - 747
1 Jul 1999
Tucker S


The Journal of Bone & Joint Surgery British Volume
Vol. 80-B, Issue 2 | Pages 208 - 211
1 Mar 1998
Saifuddin A White J Tucker S Taylor BA

Lateral oblique radiographs are considered important for the identification of spondylolytic lesions, but these projections will give a clear view only when the radiological beam is in the plane of the defect. We studied the variation in orientation of spondylolytic lesions on CT scans of 34 patients with 69 defects.

There was a wide variation of angle: only 32% of defects were orientated within 15° of the 45° lateral oblique plane. Lateral oblique radiographs should not be considered as the definitive investigation for spondylolysis.

We suggest that CT scans with reverse gantry angle are now more appropriate than oblique radiography for the assessment of spondylolysis. Variation in the angle of the defect may also need consideration when direct repair is being planned.