A small proportion of the inhabitants possesses an extra vertebral ingredient, mostly on the lumbosacral junction. This anatomical variation, typically known as a transitional vertebra, represents a congenital anomaly the place the final lumbar vertebra partially or absolutely fuses with the sacrum, or conversely, the primary sacral vertebra takes on lumbar traits. This may end up in six lumbar vertebrae as an alternative of the standard 5.
The presence of this variant could be clinically vital, probably contributing to decrease again ache and altered biomechanics. Traditionally, its identification has relied on radiographic imaging, and its affiliation with particular musculoskeletal situations has been a topic of ongoing analysis. Understanding its prevalence and potential implications is essential for correct prognosis and therapy planning in people presenting with decrease again complaints.