Bipartite portosystemic shunt with single insertion: a rare congenital vascular anomaly in a dog

A case of a bipartite extra hepatic portosystemic shunt is described in a one-year-old, male entire Maltese Terrier breed dog. On CT angiography, one vessel was visibly a portocaval shunt with the other vessel arising from the splenic vein. Both vessels formed a single insertion to the caudal vena cava cranial to the right renal vein which was managed successfully surgically via placement of a 6 mm ameroid constrictor. Multiple portosystemic shunts in dogs have been reported but to the authors’ knowledge this is the first case of a bipartite origin, single insertion portosystemic shunt reported in a dog