RÉSUMÉ
Background: Among the congenital anomalies of the spine LSTV- Lumbosacral Transitional Vertebra is the mostcommon anomaly which is associated with the complaint of low back pain in modern era. LSTVs includesacralisation of the lowermost lumbar vertebra as well as lumbarisation of uppermost sacral segment.Aims and Objectives: The present study was done to know the incidence of sacralisation of fifth lumbar vertebrain South Indian Population.Materials and Methods: The present study includes 70 dry adult human sacra of both sexes. Note was made onthe number of sacral segments in each sacrum. Sacrum with six elements and five sacral foramina were identifiedand studied.Results and Conclusion: In the present study sacralisation was observed in 8 sacra. The knowledge of sacralisationof fifth lumbar vertebra is important to clinicians in the diagnosis and treatment of low back pain