BP sacrum is associated with which condition?

• A. L4 disc bulge
• B. L5 spondylolisthesis
• C. Thoracic scoliosis
• D. SI fixation

Answer: (B)

A sacral variation like a bipartite sacrum alters how the base of the spine transfers load into the pelvis. That changed mechanics can reduce stability at the lumbosacral junction, making forward slip of the L5 vertebra relative to S1 more likely under normal activities or stresses. So when this sacral variant is present, the most likely associated issue is L5 spondylolisthesis, where L5 sits forward on S1.

In contrast, a disc bulge at L4 is a degenerative issue localized to the lumbar level, thoracic scoliosis involves the mid to upper spine, and sacroiliac joint fixation is a separate condition or treatment outcome not directly tied to this sacral variation.