Butterfly and lumbosacral transitional vertebrae
Undergoing CT colon for change in bowel habit.
Selected images from CT colon
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These selected images covering the lumbosacral spine show that L4 has a butterfly vertebral body shape with thin bony bridges anteriorly and posteriorly, and a gap centrally. The right transverse process of L5 is expanded and forms a pseudoarticulation with S1.