Lumbosacral transitional vertebra

Case contributed by Dr Olga Semivolos


Back pain.

Patient Data

Age: 35 years
Gender: Male

On sagittal images an S1 vertebra is mimicking L5 (lumbarisation of S1). If you compare the axial planes, there is a characteristic shape of lumbar facet joints on the L5/S1 level, and the S1/2 facets are smaller and flatter.


Case Discussion

Lumbasacral transitional vertebrae (LSTV) is one of the most common congenital anomalies of the lumbosacral region. It usually involves the fifth lumbar vertebra and can result in numerical abnormalities of vertebral segments. Lumbarisation of first sacral vertebra is seen in 2% of cases.

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Case information

rID: 68986
Published: 29th Jun 2019
Last edited: 30th Jun 2019
Inclusion in quiz mode: Included

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