301. Hypoattenuating periportal halo on CT in a patient population can occur in presence of a variety of diseases.
- Author
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Dressel-Böhm S, Richter H, Kircher PR, and Del Chicca F
- Subjects
- Animals, Artifacts, Cat Diseases diagnosis, Cat Diseases diagnostic imaging, Cats, Dog Diseases diagnosis, Dog Diseases diagnostic imaging, Dogs, Female, Liver pathology, Liver Diseases diagnostic imaging, Liver Diseases pathology, Male, Portal Vein pathology, Retrospective Studies, Tomography, X-Ray Computed veterinary, Liver diagnostic imaging, Portal Vein diagnostic imaging, Tomography, X-Ray Computed methods
- Abstract
Many pathologies can occur in the periportal space and manifest as fluid accumulation, visible in Computed tomography (CT) images as a circumferential region of low attenuation around the intrahepatic portal vessels, called periportal halo (PPH). This finding is associated with different types of hepatic and extra-hepatic disease in humans and remains a non-specific sign of unknown significance in veterinary literature. The aim of this study was to investigate the prevalence of PPH in a population of patients undergoing CT examination and to assess the presence of lesions related to hepatic and extra-hepatic disease in presence of PPH. CT studies including the cranial abdomen of dogs and cats performed over a 5-year period were retrospectively reviewed. The prevalence of PPH was 15% in dogs and 1% in cats. 143 animals were included and the halo was classified as mild, moderate and severe, respectively in 51%, 34% and 15% of animals. The halo distribution was generalized in 79 cases, localized along the second generation of portal branches in 63, and along the first generation only in one. Hepatic disease was present in 58/143 and extra-hepatic disease in 110/143 of the cases. Main cause of hepatic (36%) and extra-hepatic disease (68%) was neoplasia. Associations between halo grades and neoplasia revealed to be not statistically significant (p = 0.057). In 7% of animals the CT examination was otherwise unremarkable. PPH is a non-specific finding, occurring in presence of a variety of diseases in the examined patient population., Competing Interests: The authors have declared that no competing interests exist.
- Published
- 2022
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