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Computed tomographic measures of renomegaly vary among dogs with different types of congenital portosystemic shunts.
Murakami, Masahiro; Nishi, Reo; Lenoir, Kindele N.
Affiliation
  • Murakami M; Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA.
  • Nishi R; Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA.
  • Lenoir KN; Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, Indiana, USA.
Vet Radiol Ultrasound ; 64(6): 1025-1032, 2023 Nov.
Article in En | MEDLINE | ID: mdl-37850502
Renomegaly has been reported in dogs with congenital portosystemic shunts (PSS). However, no study has objectively evaluated the degree of renomegaly in dogs with different types of PSS. The purpose of this retrospective, analytical, cross-sectional study was to determine kidney size (renal length-to-L2 vertebral body ratio; RL/L2 ratio) using CT in dogs with different types of PSS and correlate with clinical information. A medical record search for dogs with a PSS diagnosed using CT between 2016 and 2020 was conducted. Breed, age, sex, body weight, and biochemistry results were recorded. Kidney and L2 vertebral body lengths were measured using multiplanar reformatted CT images, and the RL/L2 ratio was calculated. Dogs were categorized into four groups based on PSS morphology for comparisons: intrahepatic (IH; n = 19), extrahepatic portocaval (EHPC; n = 20), extrahepatic portoazygos (EHPA; n = 7), or extrahepatic portophrenic (EHPP, n = 7). The RL/L2 ratio (mean ± SD) was largest in IH (3.55 ± 0.38) and EHPC (3.55 ± 0.38), followed by EHPP (3.10 ± 0.23), and EHPA (2.78 ± 0.18). RL/L2 ratio was significantly larger in EHPC and IH (vs. EHPA and EHPP [P < .01]). Significant correlations between kidney size and creatinine, alkaline phosphatase, albumin, total protein, and ammonia were present. Renomegaly was observed in 86.8% of dogs with PSS overall, but it was uncommon in dogs with EHPA and less common in dogs with EHPP, as these two groups showed clinical signs later in life, made evident by older age at presentation. The authors suggest that the severity of hepatic dysfunction and the shunted blood volume may influence the development of renomegaly in dogs with PSS.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Portasystemic Shunt, Transjugular Intrahepatic / Dog Diseases Limits: Animals Language: En Journal: Vet Radiol Ultrasound Journal subject: DIAGNOSTICO POR IMAGEM / MEDICINA VETERINARIA / RADIOLOGIA Year: 2023 Document type: Article Affiliation country: United States Country of publication: United kingdom

Full text: 1 Collection: 01-internacional Database: MEDLINE Main subject: Portasystemic Shunt, Transjugular Intrahepatic / Dog Diseases Limits: Animals Language: En Journal: Vet Radiol Ultrasound Journal subject: DIAGNOSTICO POR IMAGEM / MEDICINA VETERINARIA / RADIOLOGIA Year: 2023 Document type: Article Affiliation country: United States Country of publication: United kingdom