Morphology of congenital portosystemic shunts involving the right gastric vein in dogs

OBJECTIVE To describe the anatomy of congenital portosystemic shunts involving the right gastric vein in dogs. MATERIALS AND METHODS Retrospective review of a consecutive series of dogs managed for congenital portosystemic shunt. RESULTS Twenty‐two dogs met the inclusion criteria of a congenital por...

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Bibliographic Details
Published in:Journal of small animal practice 2015-07, Vol.56 (7), p.430-440
Main Authors: White, R. N., Parry, A. T.
Format: Article
Language:English
Subjects:
Animals
Dog Diseases - congenital
Dog Diseases - diagnostic imaging
Dog Diseases - pathology
Dogs
Female
Male
Morphology
Portal System - abnormalities
Portal System - diagnostic imaging
Portal System - pathology
Radiography
Retrospective Studies
Stomach - blood supply
Vascular Malformations - pathology
Vascular Malformations - veterinary
Veins & arteries
Women
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Summary:OBJECTIVE To describe the anatomy of congenital portosystemic shunts involving the right gastric vein in dogs. MATERIALS AND METHODS Retrospective review of a consecutive series of dogs managed for congenital portosystemic shunt. RESULTS Twenty‐two dogs met the inclusion criteria of a congenital portosystemic shunt involving the right gastric vein with recorded intraoperative mesenteric portovenography or computed tomography angiography and gross observations at the time of surgery. Of these, 20 (91%) had a shunt that entered the pre‐hepatic caudal vena cava at the level of the epiploic foramen and two (9%) had a shunt that entered the post‐hepatic caudal vena cava at the level of the diaphragm. Shunts entering the pre‐hepatic caudal vena cava could be further classified into three consistent subdivisions. CLINICAL SIGNIFICANCE The morphology of each shunt type described appeared to be a result of an abnormal communication between the left gastric vein and the caudal vena cava, the presence or absence of an abnormal communication between the splenic, left gastric and portal veins and the subsequent development of preferential blood flow through essentially normal portal vessels within the portal venous system. The abnormal communication (shunt) was through the left gastric vein and not the right gastric vein, as might have been expected. This information may help with surgical planning in cases undergoing shunt closure surgery.
ISSN:0022-4510
1748-5827
DOI:10.1111/jsap.12355