The bony malformations of lumbosacral junction and sacrum: case reports and literature review.

The lumbosacral region, with its manifold variations and anomalies, is one of the most important section of the entire spine. From the fusion defects to the segmentation anomalies, a wide variety of malformation exists in this region. Individuals with such anomalies usually have no physical complaints until their spines undergo pathological conditions.