Sacralization: Sacralization is a congenital anomaly that occurs when the transverse processes of the L5 vertebral body fuse to the ilium. The person appears to have 4 lumbar vertebrae instead of 5. The incidence of sacralization occurs in 3.5 % of the population. Sacralization does not cause pain but can lead to adjacent stress on the sacroiliac joints or the disc space and joints above the fused segment.
Answered 5/9/2014
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