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J Vet Med Sci. 2013 Nov;75(11):1525-8. Epub 2013 Jul 9.

Computed tomography angiography of situs inversus, portosystemic shunt and multiple vena cava anomalies in a dog.

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  • 1College of Veterinary Medicine, Chonnam National University, Gwangju 500-757, Korea.


A 5-year-old Shih Tzu was presented with intermittent vomiting and anorexia. Microhepatica and reversed position of the abdominal organs were observed on radiography. Ultrasonographically, portosystemic shunt (PSS) was tentatively diagnosed. Computed tomography (CT) revealed that the distended portal vein drained into the left hepatic vein. The caudal vena cava (CdVC) split postrenally and converged at the renal level. Cranial to this, the azygos continuation of the CdVC was confirmed. In the thorax, a persistent left cranial vena cava (CrVC) was found along with right CrVC. This is the first report of a dog with persistent left CrVC and multiple abdominal malformations. CT angiography was useful in evaluating the characteristics of each vascular anomaly and determining the required surgical correction in this complex case.

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