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CT features of extrahepatic arterioportal fistula in two cats

M Choi1, H Kim1, J Yoon2

  • 1Department of Veterinary Medical Imaging, Haemaru Referral Animal Hospital, Seongnam 463-050, Republic of Korea.

The Journal of Small Animal Practice
|November 2, 2018
PubMed

Insights

This study reports the first known cases of extrahepatic arterioportal fistula in cats, a condition where an abnormal connection forms between an artery and the portal vein outside the liver. This finding helps understand rare causes of ascites in feline patients.

Area of Science:

  • Veterinary Medicine
  • Diagnostic Imaging
  • Vascular Surgery

Background:

  • Ascites in cats can be challenging to diagnose, with portal hypertension being a suspected cause.
  • Identifying the underlying etiology of ascites is crucial for effective treatment and prognosis.

Observation:

  • Two cats presented with significant ascites.
  • Contrast computed tomography (CT) revealed enhancement of the main portal vein during the arterial phase in both cases.
  • An anomalous connection was identified between the celiac artery and the extrahepatic portal vasculature.

Findings:

  • The diagnostic imaging findings led to a diagnosis of extrahepatic arterioportal fistula in both cats.
  • Extrahepatic arterioportal fistula is defined as an abnormal connection between an artery and the portal vein outside the liver.
  • This represents the first documented report of extrahepatic arterioportal fistula in feline patients.

Implications:

  • This case report expands the differential diagnoses for ascites in cats.
  • It highlights the utility of contrast CT in diagnosing vascular anomalies.
  • Further research may elucidate the prevalence and clinical significance of this condition in veterinary medicine.

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