Table 1.

Anatomic classification of congenital portosystemic shunts in dogs.

Anatomic Classification of Extrahepatic Congenital Portosystemic Shunts in Dogs *
Splenophrenic
Splenoazygos
Right gastro-caval
Splenocaval
Right gastrocaval with a caudal loop
Gastrophrenic
Left gastroazygos
Colonocaval
Portocaval
Anatomic classification of intrahepatic congenital portosystemic shunts in dogs
Traditional anatomic classification of intrahepatic congenital portosystemic shunts in dogs **
Right divisional
Left divisional
Central divisional
Anatomic subclassification of intrahepatic congenital portosystemic shunts in dogs **
Shunt Type	Insertion
Right divisional	Right lateral hepatic vein
	Caudate hepatic vein
Left divisional	Left hepatic vein
	Left phrenic vein
Central divisional	Quadrate hepatic vein
	Central hepatic vein
	Dorsal right medial hepatic vein
	Ventral aspect of caudal vena cava
Multiple	Variable
Anatomic classification of intrahepatic congenital portosystemic shunts in dogs ***
Left, right, central divisional Aneurysmal intrahepatic congenital portosystemic shunts One or more portosystemic shunts in a single liver lobe Multiple portosystemic shunts in several liver lobes

* White et al. (2018) and Fukushima et al. (2014) [14,15]. ** Plested et al. (2020) [19]. *** Bertolini et al. (2019) [18].