{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,7]],"date-time":"2025-11-07T15:33:15Z","timestamp":1762529595364,"version":"build-2065373602"},"reference-count":21,"publisher":"American Veterinary Medical Association (AVMA)","issue":"11","license":[{"start":{"date-parts":[[2025,11,1]],"date-time":"2025-11-01T00:00:00Z","timestamp":1761955200000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["ajvr"],"published-print":{"date-parts":[[2025,11,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec id=\"sc_a1\">\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>To evaluate the clinical outcomes of dogs with a single congenital extrahepatic portosystemic shunt (EHPSS), in which portal vein atresia (PVA) was considered a differential diagnosis based on CT angiography (CTA), and that underwent surgical exploration.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sc_a2\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>Medical records were retrospectively reviewed for dogs with a single congenital EHPSS and absent portal vein branches on CTA. Data collected included signalment, clinical signs, preoperative and postoperative clinicopathologic values, diagnostic imaging findings, surgical details, and short- and long-term postoperative follow-up information.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sc_a3\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>7 client-owned dogs diagnosed with congenital EHPSS and suspected portal vein atresia on CTA that underwent surgical exploration at the William R. Pritchard Veterinary Medical Teaching Hospital at the University of California-Davis from 2010 to 2022 were identified. Surgical attenuation of the EHPSS was successfully performed in 6 of 7 dogs. Intraoperative mesenteric portovenography (IOMP) and\/or clinical indicators (eg, absence of visceral congestion) were used to determine suitability for attenuation. In 2 dogs, IOMP was performed, which revealed intrahepatic portal vasculature only after temporary EHPSS occlusion. Postoperative clinicopathologic values and clinical signs were favorable in all 6 dogs that underwent attenuation, with no long-term complications reported. The numeric scoring scale applied to CTA did not appear to influence intraoperative decision-making.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sc_a4\">\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>Surgical attenuation of EHPSS in dogs with absent portal branches on CTA may be associated with favorable long-term follow-up, when supported by intraoperative findings.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"sc_a5\">\n                    <jats:title>Clinical Relevance<\/jats:title>\n                    <jats:p>These findings highlight the limitations of CTA alone in preoperative decision-making for these complex cases and support the use of dynamic evaluation, such as IOMP, in guiding treatment strategies.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.2460\/ajvr.25.04.0146","type":"journal-article","created":{"date-parts":[[2025,7,31]],"date-time":"2025-07-31T13:10:47Z","timestamp":1753967447000},"source":"Crossref","is-referenced-by-count":0,"title":["Dogs with congenital extrahepatic shunts and absent portal vasculature noted on computed tomographic angiography can successfully undergo surgical attenuation"],"prefix":"10.2460","volume":"86","author":[{"given":"Sohee","family":"Bae","sequence":"first","affiliation":[{"name":"William R. Pritchard Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California-Davis, Davis, CA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6132-156X","authenticated-orcid":true,"given":"William T. N.","family":"Culp","sequence":"additional","affiliation":[{"name":"Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Allison L.","family":"Zwingenberger","sequence":"additional","affiliation":[{"name":"Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California-Davis, Davis, CA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1272","reference":[{"issue":"6","key":"B1","series-title":"Vet Radiol Ultrasound","first-page":"702","article-title":"Anatomical classification of canine congenital extrahepatic portosystemic shunts based on CT angiography: a SVSTS and VIRIES multi-institutional study in 1082 dogs","author":"Weisse C","year":"2024","unstructured":"Weisse C, Fox-Alvarez WA, Vilaplana Grosso FR, et al. Anatomical classification of canine congenital extrahepatic portosystemic shunts based on CT angiography: a SVSTS and VIRIES multi-institutional study in 1082 dogs. Vet Radiol Ultrasound. 2024;65(6):702\u2013712. doi:10.1111\/vru.13415"},{"issue":"5","key":"B2","series-title":"J Am Vet Med Assoc","first-page":"549","article-title":"An unusual portosystemic shunt in a dog","author":"Sadanaga KK","year":"1987","unstructured":"Sadanaga KK, Corpron RE, O\u2019Brien RT. An unusual portosystemic shunt in a dog. J Am Vet Med Assoc. 1987;190(5):549\u2013551."},{"issue":"3","key":"B3","series-title":"Vet Surg","first-page":"203","article-title":"Congenital interruption of the portal vein and caudal vena cava in dogs: six case reports and a review of the literature","author":"Hunt GB","year":"1998","unstructured":"Hunt GB, Bellenger CR, Borg R, Youmans KR, Tisdall PL, Malik R. Congenital interruption of the portal vein and caudal vena cava in dogs: six case reports and a review of the literature. Vet Surg. 1998;27(3):203\u2013215. doi:10.1111\/j.1532-950x.1998.tb00119.x"},{"issue":"1","key":"B4","series-title":"J Small Anim Pract","first-page":"49","article-title":"Comparison of computed tomographic angiography and intraoperative mesenteric portovenography for extrahepatic portosystemic shunts","author":"Parry AT","year":"2017","unstructured":"Parry AT, White RN. Comparison of computed tomographic angiography and intraoperative mesenteric portovenography for extrahepatic portosystemic shunts. J Small Anim Pract. 2017;58(1):49\u201355. doi:10.1111\/jsap.12596"},{"issue":"5","key":"B5","series-title":"Vet Radiol Ultrasound","first-page":"514","article-title":"Use of intraoperative mesenteric portovenography in congenital portosystemic shunt surgery","author":"White RN","year":"2003","unstructured":"White RN, Macdonald NJ, Burton CA. 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