Alteração arteriovenosa no fígado de um cão

Abstract

Hepatic arteriovenous disorder (AAVH) is a congenital disorder characterized by the absence or malformation of vascular structures (arterial and/or venous) in the liver. In this case report, the medical records and subsequent necropsy of a 10-month-old female pit bull dog that presented ascites for a month before worsening and death were used. The criteria for the diagnosis included histopathological evidence of this hepatic arteriovenous disorder (AAVH), based mainly on the absence of the portal hepatic artery and central (centrilobular) vein, confirmed by special stains with Masson's Trichrome and Sirius Red. Dogs with AAVH often show progressive clinical signs and are characterized by different laboratory findings, as seen in the dog in this report, which were changing with the growth and and increased demand of the animal in relation to the liver, developing a severe picture of liver failure.