L5 pars defect

Case contributed by Mohammad Osama Hussein Yonso
Diagnosis certain


The patient complained of lower back pain after slipping and falling in the bathroom today at 10 am and hit buttocks. Local exam: spine- tenderness lower lumbar region, pain on movements.

Patient Data

Age: 35 years
Gender: Male

A lucency through the pars interarticularis of the L5 vertebral body is noted with grade 1 spondylolisthesis.

L5-S1inter vertebral space appears mildly narrowed.

Case Discussion

Meyerding classification system of spondylolisthesis is:

  • grade I: 0-25%

  • grade II: 26-50% 

  • grade III: 51-75% 

  • grade IV: 76-100%  

  • grade V (spondylolisthesis): >100%

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