Microscopic Hepatic Arteriovenous Fistulae and Primary Hypoplasia of the Portal Vein in a Dog

DOI
  • SAKAMOTO Yumi
    Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University
  • SAKAI Manabu
    Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University
  • ASANO Kazushi
    Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University
  • SHIBUYA Hisashi
    Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University
  • SATO Tsuneo
    Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University
  • WATARI Toshihiro
    Laboratory of Veterinary Internal Medicine, Department of Veterinary Medicine, College of Bioresource Sciences, Nihon University

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  • 組織学的な肝動静脈瘻と原発性門脈低形成の犬の1例

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An eleven-month-old male Chihuahua was brought to us with intermittent vomiting and diarrhea. Clinicopathological findings showed elevated activity levels of serum liver enzyme and high serum bile acid levels. Ultrasonography detected ascites and increased blood flow in a swollen right medial liver lobe, and laparoscopy revealed acquired portosystemic collateral vessels. These findings strongly suggested the presence of hepatic arteriovenous fistulae, but we could not observe them macroscopically at laparotomy. Histopathologically, however, an autopsy showed typical hepatic arteriovenous fistulae in the right medial lobe, and primary hypoplasia of the portal vein in the other liver lobes.

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