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Computed tomography with Hounsfield unit assessment is useful in the diagnosis of liver lobe torsion in pet rabbits (Oryctolagus cuniculus).
Daggett, Alexis; Loeber, Samantha; Le Roux, Alexandre B; Beaufrere, Hugues; Doss, Grayson.
Afiliação
  • Daggett A; Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
  • Loeber S; Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
  • Le Roux AB; Department of Diagnostic Imaging, The Animal Medical Center, New York, New York.
  • Beaufrere H; Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada.
  • Doss G; Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin.
Vet Radiol Ultrasound ; 62(2): 210-217, 2021 Mar.
Article em En | MEDLINE | ID: mdl-33340204
Clinical signs of liver lobe torsion in rabbits are often nonspecific and mimic those that are also generally detected with gastrointestinal stasis. Nonspecific clinical signs may result in pursuit of full-body imaging such as computed tomography (CT). The aim of this multicenter, retrospective, case series study was to describe CT findings of liver lobe torsion in a group of rabbits. Computed tomography studies of six rabbits with confirmed liver lobe torsion by surgery or necropsy were evaluated. The caudate liver lobe was affected in six out of six rabbits and was enlarged, rounded, hypoattenuating, heterogeneous, and minimally to noncontrast enhancing, with scant regional peritoneal effusion. Precontrast, mean Hounsfield units (HU) of the torsed liver lobe (39.3 HU [range, 24.4-48.1 HU]) were lower than mean HU of normal liver (55.1 HU [range, 49.6-60.8 HU]), with a mean torsed:normal HU ratio of 0.71 (range, 0.49-0.91). Postcontrast, mean HU of the torsed liver lobe (38.4 HU [range, 19.7-48.9 HU]) were also lower than mean HU of normal liver (108.4 HU [range, 84.5-142.0 HU]), with a lower postcontrast mean torsed:normal HU ratio of 0.35 (range, 0.14-0.48) compared to precontrast. Mean HU of torsed liver lobes had little difference pre- and postcontrast (postcontrast HU 1.0 times the average precontrast HU [range, 0.81-1.1]), and contrast enhancement of the torsed liver lobes was on average 50% lower than in normal liver. Liver lobe torsion should be considered in rabbits with an enlarged, hypoattenuating, heterogeneous, minimally to noncontrast enhancing liver lobe, particularly the caudate lobe, and scant regional peritoneal effusion.
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Texto completo: 1 Temas: ECOS / Aspectos_gerais Bases de dados: MEDLINE Assunto principal: Anormalidade Torcional / Tomografia Computadorizada por Raios X / Hepatopatias Tipo de estudo: Diagnostic_studies / Observational_studies Limite: Animals Idioma: En Revista: Vet Radiol Ultrasound Assunto da revista: DIAGNOSTICO POR IMAGEM / MEDICINA VETERINARIA / RADIOLOGIA Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Temas: ECOS / Aspectos_gerais Bases de dados: MEDLINE Assunto principal: Anormalidade Torcional / Tomografia Computadorizada por Raios X / Hepatopatias Tipo de estudo: Diagnostic_studies / Observational_studies Limite: Animals Idioma: En Revista: Vet Radiol Ultrasound Assunto da revista: DIAGNOSTICO POR IMAGEM / MEDICINA VETERINARIA / RADIOLOGIA Ano de publicação: 2021 Tipo de documento: Article