and remodeling at the site of fracture. Pathology of the caudal lumbar vertebral region appears to pre- cede catastrophic lumbar fracture and may be more common than recognized.
Acknowledgments
Many thanks to Meredith Rhea, Thomas Lazzari, and CAHFS for assistance in collecting and process-
ing the spine specimens and to Dr. Roy Pool for his invaluable consultation.
Conflict of Interest
Support was provided by the California Horse Rac- ing Board’s Racing Safety Program. The text was not reviewed or influenced by the California Horse Racing Board.