Restoration of hepatopetal portal flow in a cat with left hepatic arteriovenous malformation following left hepatic division resection and staged attenuation of acquired portosystemic shunts.

A 5-month-old Munchkin cat was referred for hematuria. Computed tomographic angiography revealed hepatic arteriovenous malformation (HAVM) within the left lateral liver lobe and multiple acquired portosystemic shunts (APSSs), in addition to a bladder calculus. Following medical management, the cat underwent attenuation of arterioportal communications. Because ligation of the left hepatic artery did not normalize portal pressure, the left hepatic division was resected. Surgical ligation of a subset of the APSSs was performed 1 month later. Postoperatively, clinical signs improved, hepatopetal portal flow was restored, and biochemical liver function parameters normalized. The remaining APSSs regressed spontaneously. To our knowledge, based on the English-language literature, this is the first reported case of feline or canine HAVM in which liver function parameters normalized.