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What is a pseudoarticulation of the left l5 transverse process with the sacrum?
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replied November 3rd, 2011
Active User, very eHealthy
The transverse process is a small bone projecting out the side of the body of the lumbar vertebrae it serves as a surface for muscles to attach to.

You have a congenital deformity where the left transverse process of your bottom vertebrae has formed an articulating joint with your sacrum.

The sacrum is a large wedge of bone in the middle of your pelvis that your spine sits on. There is almost certainly some extra bone involved in the formation of this joint.
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