Liver lobe torsion (LLT) is an uncommon condition of unknown origin in dogs. Several reports describe the clinical features and outcome, but only few of them include the imaging characteristics of this disease.

The aim of this descriptive case series was to describe the ultrasonographic (US) and multidetector-row computed tomographic (MDCT) features of LLT in a group of dogs.

Five dogs were included in this single-center descriptive study, having both US, CT and surgical and histological confirmation of LLT available for review.

Different US appearances have been found, both hypoechoic and hyperechoic liver lobes and heterogeneous mass-like lesions, with fluid and gas content. At three-phase MDCT examination, LLT appeared as fluid- and gas-filled lesions (consistent with abscess transformation), or as hypoattenuating hypovascular lobes. Two different vascular signs were also described: whirl sign or vascular interruption were seen in all cases, allowing a correct pre-surgical diagnosis in all the cases presented.

Multiphase MDCT was a helpful imaging method for the correct pre-surgical diagnosis of LLT in dogs, and its use in the suspected cases is therefore advisable.

肝叶扭转（LLT）是犬中不明原因的罕见病。一些报告描述了临床特征和结局，但只有少数报道了这种疾病的影像学特征。

这个描述性病例系列的目的是描述一组狗中LLT的超声检查（US）和多排行计算机断层摄影（MDCT）特征。

该单中心描述性研究包括了五只狗，其US，CT以及LLT的手术和组织学确认均可供审查。

已经发现了不同的美国外观，包括低回声和高回声肝叶以及异质性肿块样病变，并伴有液体和气体。在三阶段MDCT检查中，LLT表现为充满液体和气体的病变（与脓肿转化一致）或血管壁减低的肺叶减退。还描述了两种不同的血管征：在所有病例中均观察到旋转征兆或血管中断，从而在所有病例中均能进行正确的术前诊断。

多相MDCT是对犬LLT进行正确的术前诊断的有用影像学方法，因此建议在可疑病例中使用它。