Breeds affected by PSS

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What breeds are affected by congenital portosystemic shunts?

There is a breed predisposition to congenital PSS in the following breeds:

extrahepatic PSS: small breeds, especially the Yorkshire terrier, miniature schnauzer and, less commonly, Cairn terriers, Maltese.

intrahepatic PSS: large and giant breeds, especially the Irish wolfhound and, less commonly, Australian cattle dogs, golden retrievers, Labrador retrievers. Approximately one third of large dogs with shunts have extra-hepatic shunts.

For many breeds and many disorders, the studies to determine the mode of inheritance or the frequency in the breed have not been carried out, or are inconclusive. We have listed breeds for which there is a general consensus among those investigating in this field and among veterinary practitioners, that the condition is significant in this breed.

Transcolonic portal scintigraphy is a very accurate procedure for the diagnosis of porto-systemic shunt in small animals.

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