肝脏上皮样血管内皮瘤:影像表现和病理基础

目的:分析肝脏上皮样血管内皮瘤(EHE)的CT和MRI表现,并与病理结果对照.方法:经病理证实的肝脏EHE10例,10例均行多排螺旋CT平扫和动态增强扫描；其中5例行MR检查,包括平扫和动态增强成像；其中1例行选择性肝动脉造影.将影像学结果与病理结果作对照分析.结果:共检出病灶80个,最大直径3.0～44.6mm,平均(17.8-±7.0) mm,病灶分布于肝脏各段,其中31个病灶紧邻肝包膜下生长.5例患者MR检出40个病灶,T1WI均示低信号,T2WI示中高信号.5例均可见包膜回缩征,增强后10个病灶呈晕征.CT平扫10例患者共80个低密度灶,其中26个出现融合.2例患者病灶内见钙化,8例见包膜回缩征,增强扫描38个病灶呈晕征,且门脉期显示更清晰.1例选择性血管造影显示肝实质边缘斑片状染色伴周围细小血管.组织学上示病变纤维组织及血管样结构增生,其间见散在的形态不规则的上皮样细胞,其内见印戒样结构.免疫组织化学染色示10例CD34全部阳性,5例CD31阳性,4例FVIIIRAg阳性.结论:肝脏EHE可表现为单发结节和弥漫结节,多位于肝包膜下生长,结节可融合,可具有晕征及包膜回缩征,MRI对晕征的显示较CT好.

Hepatic Epithelioid Hemangioendothelioma: Imaging and Pathologic Findings

Purpose:To analyze the CT and MRI features of hepatic epithelioid hemangioendothelioma(EHE) with the correlative study of pathology.Methods:Ten cases of hepatic EHE confirmed by pathology underwent plain and dynamic contrast-enhanced multi-detector row CT examination.Five of them underwent additional MRI including plain T1-weighted imaging(T1WI),T2-weighted imaging(T2WI) and dynamic contrast-enhanced scanning.One of them underwent selective hepatic arteriography.The imaging findings were reviewed retrospect...