Alteração arteriovenosa hepática (AAVH) em canino : relato de caso

Abstract

This paper presents a case report of an 11-month-old female dog with hepatic insufficiency associated with Hepatic Arteriovenous Malformation (HAVM), a congenital malformation. The patient underwent prior monitoring with blood tests and imaging, as well as clinical care during hospitalization to control symptoms. Despite efforts, the animal died, and necropsy revealed macroscopic changes in the liver, such as paleness, mild yellowing, surface irregularity, and the presence of fibrin. Microscopic analysis of collected fragments confirmed the diagnosis of HAVM. HAVM is characterized by a malformation of hepatic arterioles and/or venules, resulting in hepatocyte irrigation failure. This leads to atrophy and dysfunction of these cells, resulting in a systemic condition and the development of portosystemic shunts. Affected dogs show progressive clinical signs and alterations in laboratory tests. In the reported case, the patient demonstrated a progression of symptoms over time, culminating in acute hepatic insufficiency. This report highlights the importance of early recognition and proper management of HAVM in dogs, aiming to improve the prognosis and quality of life of these patients.