Note: Distinction must be made between all hepatic tumours and [[Liver Unknown Aetiology - Pathology #Nodular hyperplasia|benign nodular hyperplasia]] that is frequently observed in the older canine. The most significant primary tumours in the dog are hepatomas, [[Carcinoma #Hepatocytic|Hepatocellular]] and [[Carcinoma#Cholangiocellular|Cholangiocellular]] carcinomas and hepatic carcinoids. [[Carcinoma#Hepatocytic|Hepatocellular carcinoma]] and [[Carcinoma#Cholangiocellular|Cholangiocellular carcinoma]] are the most significant in cats.
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Note: Distinction must be made between all hepatic tumours and [[Liver - Nodular Hyperplasia|benign nodular hyperplasia]] that is frequently observed in the older canine. The most significant primary tumours in the dog are hepatomas, [[Carcinoma #Hepatocytic|Hepatocellular]] and [[Carcinoma#Cholangiocellular|Cholangiocellular]] carcinomas and hepatic carcinoids. [[Carcinoma#Hepatocytic|Hepatocellular carcinoma]] and [[Carcinoma#Cholangiocellular|Cholangiocellular carcinoma]] are the most significant in cats.