A Multicenter Retrospective Study Assessing Progression of Biliary Sludge in Dogs Using Ultrasonography
Journal of veterinary internal medicine(2022)
Abstract
AbstractBackgroundBiliary sludge (BS) frequently is identified on ultrasonographic examination and is described as incidental. It is hypothesized that biliary stasis and hypersecretion play a role in both BS and gallbladder mucocele (GBM) formation. Recent studies have documented similarities in composition of BS and GBM, and there are several examples of progression from BS to GBM in the veterinary literature.ObjectivesTo assess the relationship between the presence of BS and later development of GBM in dogs, over time periods >12 months.AnimalsA total of 154 dogs with BS and ultrasonographic follow‐up >12 months.MethodsMedical records were retrospectively collected from 9 UK‐based referral centers for all available time points. A semiobjective scoring system was used to track volume of BS within the gall bladder (GB) over time.ResultsTwenty dogs developed GBM during the study period. Shetland Sheepdogs (odds ratio [OR], 40.99; 95% confidence interval [CI], 3.61‐465.95; P = .003) and Border Terriers (OR, 11.66; 95% CI, 3.28‐46.63; P < .001) were independent risk factors for the development of GBM. Non–gravity‐dependent BS (NDBS) was noted to form before GBM development in 9/20 dogs, and breeds at‐risk for GBM were more likely to have NDBS. Odds for the development of GBM increased with BS score.Conclusions and Clinical ImportanceDogs with NDBS may be at risk for the development of GBM and a stratified BS scoring system could allow for semiobjective monitoring over time, particularly in at‐risk breeds.
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Key words
gallbladder mucocele,nondependent biliary sludge,observational retrospective,risk factors
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