1. 2006;9;53-56Lumbosacral Transitional Vertebrae:Incidence in a Consecutive Patient Series
   A Prospective Observational Report
   Elva G. Delport, MD, Tony R. Cucuzzella, MD, Nancy Kim, MD, Julie Marley, PT, Dip MDT, Christine Pruitt, RN, MS, and Anton G. Delport, PT, Dip MDT.

Background: Great variability exists in the reported frequency of transitional vertebra
in the general population as well as in symptomatic lumbar spine patients

Objective: To determine the occurrence rate of transitional vertebra in consecutive lumbar spine patients in our practice

Design: A prospective, observational study

Methods: Plain films were viewed and the presence or absence of a lumbar transitional vertebra was documented. Transitional vertebrae were classified as incomplete or complete.

Results: Of the 300 consecutive patients, 30% had a transitional vertebra.

Conclusion: Our percentage of patients with a transitional vertebra was higher than the percentages reported for the general population. This supports our belief that the alteration in mechanics caused by a transitional vertebra may at times contribute to pain generation. Additionally, as a transitional segment may not always be visualized on MRI, obtaining plain films prior to an injection or surgery will help prevent confusion over the appropriate level for the procedure.

Key words: Lumbosacral vertebra, transitional vertebra, radiology, low back pain