Table 1.

Signalment, clinical signs, and diagnosis of 6 dogs with evidence of portal hypertension (PH) and absence of pancreatitis on histologic assessment.

Case	Breed	Sex	Age	Clinical signs	Cause of PH
1	Giant Schnauzer	SF	1 y, 6 mo	Lethargy, anorexia	Systemic histiocytic sarcoma
2	Smooth Collie	F	4 mo	Lethargy, anorexia, abdominal distention	Arteriovenous malformation
3	Boxer cross	SF	1 y, 2 mo	Fever, icterus, vomiting, weight loss, hyporexia	Caroli syndrome
4	Pomeranian	M	6 y, 2 mo	Lethargy, anorexia, abdominal distention	Chronic hepatitis + unusual congenital hepatic malformation with 2 independent liver parts and 2 independent portal vessels
5	Maltese	SF	3 y, 6 mo	Lethargy, icterus, abdominal distention	Cirrhosis secondary to lobular dissecting hepatitis
6	Labradoodle	CM	4 y, 9 mo	Hyporexia, vomiting, abdominal distention	Chronic hepatitis

CM = castrated male; F = female; M = male; SF = spayed female.