title: Contrast-enhanced computed tomography angiography and volume-rendered imaging for evaluation of cellophane banding in a dog with extrahepatic portosystemic shunt.
abstract: A 4-year-old, 1.8 kg, male, castrated Maltese was presented for evaluation of urolithiasis. Urinary calculi were composed of ammonium biurate. Preprandial and postprandial bile acids were 44.2 and 187.3 micromol/l, respectively (reference ranges 0-10 and 0-20 micromol/l, respectively). Single-phase contrast-enhanced computed tomography angiography (CTA) with volume-rendered imaging (VRI) was obtained. VRI revealed a portocaval shunt originating just cranial to a tributary of the gastroduodenal vein and draining into the caudal vena cava at the level of the epiploic foramen. CTA revealed a 3.66 mm-diameter shunt measured at the level of the termination of the shunt and a 3.79 mm-diameter portal vein measured at the level between the origin of the shunt and the porta of the liver. Surgery was performed using cellophane banding without attenuation. Follow-up single-phase CTA with VRI was obtained 10 weeks after surgery. VRI revealed no evidence of portosystemic communication on the level of a cellophane band and caudal to the cellophane band. CTA demonstrated an increased portal vein diameter (3.79-5.27 mm) measured at the level between the origin of the shunt and the porta of the liver. Preprandial and postprandial bile acids were 25 and 12.5 micromol/l, respectively (aforementioned respective reference ranges), 3 months post-surgery. No problems were evident at 6 months.
authors.affiliation: Department of Veterinary Surgery, College of Veterinary Medicine, and the Veterinary Science Research Institute, Konkuk University, Seoul 143-701, Korea.
authors.forename: H
authors.initials: H
authors.lastname: Yoon
authors.forename: Y
authors.initials: Y
authors.lastname: Choi
authors.forename: H
authors.initials: H
authors.lastname: Han
authors.forename: S
authors.initials: S
authors.lastname: Kim
authors.forename: K
authors.initials: K
authors.lastname: Kim
authors.forename: S
authors.initials: S
authors.lastname: Jeong
mesh_terms: D000792:Angiography / Q000662:veterinary; D000818:Animals; D002476:Cellophane; D003287:Contrast Media; D004283:Dog Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D004285:Dogs; D006975:Hypertension, Portal / Q000000981:diagnostic imaging / Q000601:surgery / Q000662:veterinary*; D008297:Male; D011168:Portal System / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D011169:Portal Vein / Q000002:abnormalities / Q000000981:diagnostic imaging / Q000601:surgery; D014057:Tomography, X-Ray Computed / Q000662:veterinary; D016896:Treatment Outcome
chemical_list: D003287:Contrast Media; D002476:Cellophane