A lumbosacral transitional vertebra (LSTV) refers to a congenital variation at the lumbosacral transition of the spine, such as a sacralization of the 5th lumbar vertebra or the lumbarization of the 1st sacral vertebra.
Epidemiology
Lumbosacral transitional anomalies occur with a prevalence of approximately 4-30% in the population[^1].
Clinical Significance
The identification of such a transitional vertebra has high clinical significance, as failing to recognize it can lead to the risk of performing infiltrations/blockades or surgeries at the incorrect level.
Classification
The classification of lumbosacral transitional vertebrae can be carried out according to various classifications, with the most commonly used classification being that by Castellvi.