Lumbosacral transitional vertebra - type IIIb

Case contributed by Vikas Shah


Undergoing CT colon for change in bowel habit.

Patient Data

Age: 60 years
Gender: Male

Selected images from CT study


Both transverse processes of L5 are expanded and are fused to S1.

Case Discussion

This is an example of a type IIIb lumbosacral transitional vertebral body (Castellvi classification).

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