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Endplate junction failure (EPJF) is characterized by IVDH, accompanied by endplate irregularities (type A), rim avulsions (type B), or larger bony avulsions on one (type C) or both endplates (type D), associated with an adjacent endplate defect. This retrospective study reports the CT prevalence of presumed EPJF in dogs and its associations with signalment and other lumbosacral CT abnormalities. CT scans, including the lumbosacral spine of dogs obtained at two institutions, were assessed, yielding 324 scans. Presumed EPJF was found in 69 dogs (21%) and AFF in 68 dogs (21%), commonly at the caudal endplate of the last lumbar vertebra (71%). The remaining 187 dogs did not show presumed EPJF or AFF. Presumed EPJF type A occurred in 49\/69, type B in 19\/69, and type C in 1\/69 dogs. Univariable logistic regression showed that presumed EPJF was associated with significantly higher IVDH grades than AFF. In the multiple regression model, presumed EPJF and AFF remained associated with increasing age and spondylosis deformans. Presumed EPJF was associated with vertebral endplate sclerosis and AFF with zygapophyseal joint osteoarthritis. In conclusion, presumed EPJF was observed on CT in 21% of dogs with lumbosacral IVDH. Prospective studies correlating EPJF on CT with clinical, surgical, and histopathological findings are needed for a better understanding of the underlying pathology and clinical relevance.<\/jats:p>","DOI":"10.1111\/vru.13398","type":"journal-article","created":{"date-parts":[[2024,6,22]],"date-time":"2024-06-22T06:14:45Z","timestamp":1719036885000},"page":"567-577","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Prevalence of presumed endplate junction failure at the lumbosacral intervertebral junction in dogs on computed tomography"],"prefix":"10.1111","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8836-097X","authenticated-orcid":false,"given":"Anna R.","family":"Tellegen","sequence":"first","affiliation":[{"name":"Division of Diagnostic Imaging, Department of Clinical Sciences Faculty of Veterinary Medicine  Utrecht The 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