Abstract：
A 1-year-old Miniature Horse filly was presented for chronic lethargy and hyporexia. Elevated liver enzymes, bile acids, and ammonia were noted on bloodwork. The primary differential diagnosis was a portosystemic shunt (PSS). Three-phase computed tomographic angiography findings were consistent with a transhepatic portosystemic shunt. Percutaneous liver biopsy confirmed severe diffuse hepatic changes, most likely due to chronic pyrrolizidine alkaloid toxicosis, and medical management was elected. Based on an extensive literature review, this is the first report of a transhepatic portosystemic collateral vessel in a horse. Computed tomographic angiography is feasible and useful for the diagnosis of PSS in miniature horses.
摘要：
一只1岁的小型马雌马因慢性嗜睡和缺氧而出现。肝酶升高,胆汁酸，和氨在血液工作中被发现。主要鉴别诊断为门体分流（PSS）。三相计算机断层扫描血管造影结果与经肝门体分流术一致。经皮肝活检证实严重弥漫性肝改变，很可能是由于慢性吡咯里西定生物碱中毒，医疗管理当选。基于广泛的文献综述，这是马的经肝门体侧支血管的首次报道。计算机断层扫描血管造影对于诊断小型马的PSS是可行且有用的。
