Spondylolysis and spondylolisthesis

(A) Left posterolateral oblique view.
(B) Transverse CT.
(C) "Scotty dog sign" in posterolateral oblique view of lumbar vertebra.
(D) Median MRI, spondylolisthesis secondary to spondylolysis of L5.

Reproduced with permission from: Back. In: Clinically Oriented Anatomy, 7th ed, Moore KL, Dalley AF, Agur AM (Eds), Lippincott Williams & Wilkins, Philadelphia 2013. Copyright © 2013 Lippincott Williams & Wilkins. www.lww.com.

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