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KMID : 1094020130300040273
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Journal of Veterinary Clinics
2013 Volume.30 No. 4 p.273 ~ p.277
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Diagnostic Imaging Features of Asymptomatic Extrahepatic Portosystemic Shunt Detected by CT in Dogs
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Choi Soo-Young
Lee In
Choi Ho-Jung
Lee Young-Won
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Abstract
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This study was performed to compare clinical and diagnostic imaging features between asymptomatic and symptomatic extrahepatic portosystemic shunts in dogs. The data of thirty patients diagnosed with extrahepatic PSS by multi-detector CT were reviewed, and the dogs were divided into asymptomatic (9/30) and symptomatic (21/30) groups. Signalments, hematologic results, liver size, morphologic classifications and main portal vein to abdominal aortic ratio (PV/AO) at the porta hepatis level from CT images were evaluated in two groups. Shih-tzu (5/9) was the most frequent breed in asymptomatic group, and various breeds were presented in symptomatic group. Mean age of asymptomatic group (9.2 ± 3.2 years) was significantly higher than that of symptomatic group (4.5 ± 3.2 years). The most morphologic form of shunt vessel was the splenophrenic shunt (16/30). PV/AO of asymptomatic group (1.1 ± 0.19) was significantly higher than the values of symptomatic group (0.55 ± 0.19). Clinical signs, hematologic results and diagnostic imaging findings of asymptomatic PSS are too nonspecific to suspect PSS. Therefore, considering of patient’s age and CT examination with application of PV/AO ratio could be useful for the diagnosis of asymptomatic PSS.
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KEYWORD
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asymptomatic, PSS, CT, PV/AO ratio, dog
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