Pars interarticularis defect and spondylolisthesis

Case contributed by Daniel M Conroy
Diagnosis certain

Presentation

Chronic lower back pain.

Patient Data

Age: 60 years
Gender: Male
Frontal
Lateral
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Info

Lateral projection shows L3 pars interarticularis defects and grade 1 spondylolisthesis of L3 on L4.

Case Discussion

This case demonstrates bilateral L3 pars defects (spondylolysis), which is unusual as >95% of these defects occur at either L4 or L5. 

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