Charles Louis Davis and Samuel Wesley Thompson DVM Foundation

For the Advancement of Veterinary and Comparative Pathology

info@cldavis.org | Phone: 847-367-4359 | Fax: 847-247-1869

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  • SPECIES:
    • EQUINE
  • SYSTEM:
    • SKELETAL
  • ORGAN:
    • BONE-VERTEBRA
  • DIAGNOSIS:
    • LUMBAR FRACTURE, L6
  • CAUSE:
    • TRAUMA
  • CONTRIBUTOR:
    • STEINBERG
  • INSTITUTION:
    • University of Wisconsin
  • GENPATH:
    • TRAUMA/FRACTURE/HEMORRHAGE
  • COMMENTS:
    • Collar EM, Zavodovskaya R, Spriet M, Hitchens PL, Wisner T, Uzal FA, Stover SM. Caudal lumbar vertebral fractures in California Quarter Horse and Thoroughbred racehorses. Equine Vet J. 2015 Sep;47(5):573-9. Lumbar vertebral fractures occurred in 38 Quarter Horse and 29 Thoroughbred racehorses over a 22 year period, primarily involving the 5th and/or 6th lumbar vertebrae (L5-L6; 87% of Quarter Horses and 48% of Thoroughbreds). Lumbar vertebral fractures were the third most common musculoskeletal cause of death in Quarter Horses and frequently involved a jockey injury. Lumbar vertebral specimens contained anatomical variations in the number of vertebrae, dorsal spinous processes and intertransverse articulations. Lumbar vertebral fractures examined in 6 racehorse specimens (5 Quarter Horses and one Thoroughbred) coursed obliquely in a cranioventral to caudodorsal direction across the adjacent L5-L6 vertebral endplates and intervertebral disc, although one case involved only one endplate. All cases had evidence of abnormalities on the ventral aspect of the vertebral bodies consistent with pre-existing, maladaptive pathology.