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Objectives:
The prevalence of various canine congenital extrahepatic portosystemic shunts (EHPSS) has not been fully elucidated. The goal of this study was to use CT angiography to create an anatomical-based nomenclature system for canine congenital EHPSS. Subjective portal perfusion scores were generated to determine if portal vein development was associated with different breeds, patient age, or shunt conformations.
Methods:
Data collected respectively from the SVSTS and VIRIES list-serves included patient DOB, gender, breed, weight, CT date, and reported diagnosis. A single author (CW) viewed all CT scans and classified shunts based upon the shunt portal vessel of origin, the shunt systemic vessel of insertion, and any substantial portal vessels contributing to the shunt. Additionally, hepatic portal perfusion was subjectively scored between 0 (poor) and 4 (good/normal) based upon caliber of the intrahepatic PVs.
Results:
1182 CT scans were submitted from 13 different institutions. Due to exclusion criteria, 82 (6.8%) were removed leaving 1082 CT scans to be included. 45 different EHPSS anatomies were identified with 5 classifications accounting for 85% of all shunts (LGP [27%], LGA [19%], LGC [15%], aLGC +RGV [12%], and aLGC +RGV +SGV [11%]). Shunt origin involved the left gastric vein (LGV) in 95% of the described classifications. Significant differences were identified among the 5 most common shunt types with respect to age at time of CT scan (p<0.001), breed (p<0.001), weight (p<0.001), gender (p=0.009), and subjective portal perfusion score (p<0.001).
Conclusions:
An anatomical classification system for canine EHPSS may enable improved understanding, treatment comparisons, and outcome prediction for these patients.
34th Annual Scientific Meeting proceedings
Stream:
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Session: STS and Oncology Short Communications
Date/Time: 05-07-2024 (17:00 - 17:15) | Location: Auditorium 4
Date/Time: 05-07-2024 (17:00 - 17:15) | Location: Auditorium 4
Anatomical Classification Of Canine Congenital Extrahepatic Portosystemic Shunts Based On Ct Angiography: An Svsts And Viries Multi-Institutional Study In 1128 Dogs
Weisse C*1, Fox-Alvarez WA*2, Vilaplana Grosso FR2, Asano K3, Ishigaki K3, Zwingenberger A4, Carroll KA*4, Scharf VF*5, Lipscomb V*6, Wallace ML*7, Aly A8, Biscoe B9, Davidson JR*10, Arai S*11, Amato N*12, Ryan SD*13, Woods S1, An A14
1Animal Medical center, NY, USA, 2University of Florida, Gainesville, USA, 3Nihon University, Fujisawa, Japan, 4University of California - Davis, Davis, USA, 5North Carolina State University, Raleigh, USA, 6Royal Veterinary College, Hatfield Herts, United Kingdom, 7University of Georgia, Athens, USA, 8Cornell University, Ithaca, USA, 9Animal Imaging, Irving, USA, 10Texas A&M University, College Station, USA, 11University of Minnesota, St. Paul, USA, 12Ethos Veterinary Hospital, Woburn, USA, 13University of Melbourne, Werribee, Australia, 14Weill Cornell Medicine, NY, USA.
Objectives:
The prevalence of various canine congenital extrahepatic portosystemic shunts (EHPSS) has not been fully elucidated. The goal of this study was to use CT angiography to create an anatomical-based nomenclature system for canine congenital EHPSS. Subjective portal perfusion scores were generated to determine if portal vein development was associated with different breeds, patient age, or shunt conformations.
Methods:
Data collected respectively from the SVSTS and VIRIES list-serves included patient DOB, gender, breed, weight, CT date, and reported diagnosis. A single author (CW) viewed all CT scans and classified shunts based upon the shunt portal vessel of origin, the shunt systemic vessel of insertion, and any substantial portal vessels contributing to the shunt. Additionally, hepatic portal perfusion was subjectively scored between 0 (poor) and 4 (good/normal) based upon caliber of the intrahepatic PVs.
Results:
1182 CT scans were submitted from 13 different institutions. Due to exclusion criteria, 82 (6.8%) were removed leaving 1082 CT scans to be included. 45 different EHPSS anatomies were identified with 5 classifications accounting for 85% of all shunts (LGP [27%], LGA [19%], LGC [15%], aLGC +RGV [12%], and aLGC +RGV +SGV [11%]). Shunt origin involved the left gastric vein (LGV) in 95% of the described classifications. Significant differences were identified among the 5 most common shunt types with respect to age at time of CT scan (p<0.001), breed (p<0.001), weight (p<0.001), gender (p=0.009), and subjective portal perfusion score (p<0.001).
Conclusions:
An anatomical classification system for canine EHPSS may enable improved understanding, treatment comparisons, and outcome prediction for these patients.
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