Computed tomographic morphology and clinical features of extrahepatic portosystemic shunts in 172 dogs in Japan |
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| Authors: | K. Fukushima H. Kanemoto K. Ohno M. Takahashi R. Fujiwara R. Nishimura H. Tsujimoto |
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| Affiliation: | 1. Division of Clinical Radiology, Department of Clinical Veterinary Medicine, Vetsuisse-Faculty, University of Berne, 3012 Berne, Switzerland;2. Division of Neuroscience, Department of Clinical Veterinary Medicine, Vetsuisse-Faculty, University of Berne, 3012 Berne, Switzerland;3. Clinical Diagnostic Laboratory, Department of Clinical Veterinary Medicine, Vetsuisse-Faculty, University of Berne, 3012 Berne, Switzerland;1. Department of Veterinary Clinical Sciences, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, AL9 7TA, United Kingdom;2. Cave Veterinary Specialists, George''s Farm, West Buckland, Nr. Wellington, TA21 9LE, United Kingdom;3. Department of Pathology and Infectious Diseases, Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, AL9 7TA, United Kingdom;4. Department of Comparative Biomedical Sciences, Royal Veterinary College, Royal College Street, London, NW1 0TU, United Kingdom;5. Veterinary Referral Hospital, 18/151-159 Princess Hwy, Hallam, Vic, Australia;1. Department of Veterinary Medical Sciences, School of Agriculture and Veterinary Medicine, University of Bologna, via Tolara di Sopra, 50, 40064 Ozzano dell''Emilia, Italy;2. Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands;3. Division of Diagnostic Imaging, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 108, 3584 CM Utrecht, The Netherlands;4. Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan, 108, 3584 CM Utrecht, The Netherlands |
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| Abstract: | Canine extrahepatic congenital portosystemic shunts (EH-cPSS) are classified into several anatomical types, depending on the origin and termination of the shunt vessel. The aim of this retrospective study was to determine the proportion and clinical features of each anatomical shunt type in a population of dogs presented to a veterinary teaching hospital in Japan. Dogs diagnosed with EH-cPSS using computed tomographic (CT) portography were included (n = 172) and shunts were classified based on previous reports. Clinical data were collected from case records and analysed statistically. The most common anatomical type was the spleno-phrenic shunt (n = 64), followed by the spleno-azygos (n = 38), right gastric-caval (n = 29), spleno-caval (n = 21), right gastric-caval with caudal loop (n = 9), right gastric-phrenic (n = 6), colono-caval (n = 3), spleno-phrenic and azygos (n = 1), and porto-caval (n = 1) shunts. Spleno-phrenic and spleno-azygos shunts were diagnosed more frequently in older dogs than right gastric-caval and spleno-caval shunts (P < 0.05). The portal vein/aortic (PV/Ao) ratio was significantly larger in dogs with spleno-phrenic shunts than in dogs with spleno-azygos, right gastric-caval or spleno-caval shunts (P < 0.05). The PV/Ao ratio was significantly larger in dogs with spleno-azygos shunts than in dogs with right gastric-caval shunts. Dogs with spleno-phrenic shunts had significantly lower serum alkaline phosphatase activities than those with right gastric-caval or spleno-caval shunts. Dogs with spleno-phrenic shunts had significantly lower fasting ammonia concentrations than those with spleno-caval shunts. |
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| Keywords: | Portosystemic shunt Canine Computed tomography Portography |
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