ArticleThe Journal of veterinary medical science2026
Renomegaly severity and prevalence differ by shunt type and inversely correlate with CT-assessed portal perfusion in cats with extrahepatic portosystemic shunt.
Article in The Journal of veterinary medical science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This retrospective study evaluated 83 cats with a single extrahepatic portosystemic shunt (PSS)-Portocaval (n=1), Left gastroazygos (n=2), Left gastrocaval (n=9), Left gastrophrenic (n=24), and Splenosystemic (n=47)-to evaluate whether the prevalence and severity of renomegaly in cats with extrahepatic PSS differ by shunt type, and to assess associations with computed tomography (CT)-based portal perfusion, and serum biochemical parameters. Renal size was quantified using the kidney length-to-the second lumbar vertebral length ratio (K/L2 ratio), and portal perfusion by the portal vein diameter-to-aortic diameter ratio (PV/Ao ratio). These indices were compared between shunt types and correlated with biochemical parameters. The Left gastrocaval group showed the highest mean K/L2 ratio (2.88 ± 0.24) and 100% prevalence of renomegaly, compared to the Left gastrophrenic (2.39 ± 0.23; 37.5%) and Splenosystemic groups (2.21 ± 0.16; 12.8%). Conversely, the median PV/Ao ratio was the lowest in the Left gastrocaval group (0.56 [0.47-0.61]), intermediate in the Left gastrophrenic group (0.89 [0.60-0.95]), and highest in the Splenosystemic group (1.12 [0.90-1.15]), indicating varied severity of portal hypoperfusion. Renal size and portal perfusion showed a significant inverse correlation (r
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