Development of an animal model for radiofrequency ablation of primary, virally induced hepatocellular carcinoma in the woodchuck |
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Authors: | Burke Charles T Cullen John M State Andrei Gadi Sashi Wilber Kathy Rosenthal Michael Bulysheva Anna Pease Anthony Mauro Mathew A Fuchs Henry |
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Institution: | aDepartment of Radiology, University of North Carolina, Chapel Hill, North Carolina;bDepartment of Computer Science, University of North Carolina, Chapel Hill, North Carolina;cCollege of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina;dInnerOptic Technology, Hillsborough, North Carolina;eDepartment of Radiology, Brigham and Women's Hospital, Boston, Massachusetts;fPhilips Institute of Oral and Craniofacial Molecular Biology, Virginia Commonwealth University School of Dentistry, Richmond, Virginia |
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Abstract: | PurposeTo develop a consistent and reproducible method in an animal model for studies of radiofrequency (RF) ablation of primary hepatocellular carcinoma (HCC).Materials and MethodsFifteen woodchucks were inoculated with woodchuck hepatitis virus (WHV) to establish chronic infections. When serum γ-glutamyl transpeptidase levels became elevated, the animals were evaluated with ultrasound, and, in most cases, preoperative magnetic resonance (MR) imaging to confirm tumor development. Ultimately, RF ablation of tumors was performed by using a 1-cm probe with the animal submerged in a water bath for grounding. Ablation effectiveness was evaluated with contrast-enhanced MR imaging and gross and histopathologic analysis.ResultsRF ablation was performed in 15 woodchucks. Modifications were made to the initial study design to adapt methodology for the woodchuck. The last 10 of these animals were treated with a standardized protocol using a 1-cm probe that produced a consistent area of tumor necrosis (mean size of ablation, 10.2 mm × 13.1 mm) and led to no complications.ConclusionsA safe, reliable and consistent method was developed to study RF ablation of spontaneous primary HCC using chronically WHV-infected woodchucks, an animal model of hepatitis B virus–induced HCC. |
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Keywords: | Abbreviations: HCC hepatocellular carcinoma RF radiofrequency WHV woodchuck hepatitis virus |
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