Retrospective Liver Histomorphological Analysis in Dogs in Instances of Clinical Suspicion of Congenital Portosystemic Shunt.

Introduction: The clinical symptoms of portosystemic shunts (PSSs) and hepatic microvascular dysplasia (HMD) - portal vein hypoplasia (PVH) in dogs are similar. PSSs are abnormal vascular connections between the portal vein system and systemic veins. HMD is a very rare developmental vascular anomaly, recognisable during histopathological examination.