【摘要】 目的探讨肝脏上皮样血管瘤CT、MRI表现。方法回顾性分析经手术病理证实的6例肝脏上皮样血管瘤CT、MRI表现,并将影像学表现与病理学特征对照。结果 6例患者中,2例单发,4例多发;病灶为椭圆形或类圆形软组织肿块;CT平扫病灶实质密度稍低且常位于肝包膜下,最大径2.0～9.9 cm;密度常不均匀,可见不规则坏死区;多期增强扫描:5例病灶实质部分明显强化,静脉期及实质期有边缘部分向中央充填强化的趋势,1例病灶动脉期强化不明显,静脉期及实质期表现为均匀轻中度强化。2例病灶MRI表现为稍长T1稍长T2信号影,1例见不完整的低信号环,1例病灶见肝包膜回缩。病理学检查肿瘤大多由梭形细胞构成,CD31、CD34及Vimentin表达均阳性。结论肝脏上皮样血管瘤是一种罕见的血管源性肿瘤,影像学表现多为肝脏多发占位性病变,病灶多位于肝包膜下,可见包膜回缩征,密度不均,边缘清晰,增强扫描呈轻到中度强化,但最终确诊须依靠病理学。更多还原

【Abstract】 Objective To explore CT,MRI features of hepatic epithelioid haemangioendothelioma.Methods 6 cases of epithelioid haemangioendothelioma pathological and their CT,MRI data in our unit were retrospectively studied.Results The tumor was found multiple in 4 cases and single in 2 cases;all of the lessions appeared as oval or round mass;On CT images,tumor showed as slightly low density soft tissue mass,which were usually found near the surface of the hepatic.The diameters of the lessions were form 2.0 cm to 9.9 cm.5 tumors showed inhomogeneous density.Cystic degeneration and necrosis were very obvious.In the contrast enhancement scan,5 cases of tumors had shown a marked enhancement in arterial phase,in venous phase and delay phase the lesion gradually strengthened from the edge to the central,1 case showed a gently enhancement in arterial phase,in venous phase and delay phase the enhancement increased gradually.2 cases underwent MRI examination.The lession had an incomplete lesion edge,which showed as the the low signal ring in 1 case.The other case showed the withdrawal of liver capsule.Epithelioid haemangioendothelioma composed chiefly of fusiform cell cases CD31,CD34 and Vimentin usually were proved positive in immunohistochemistry.Conclusion Hepatic epithelioid haemangioendothelioma is a rarely seen vascular tumors.Imaging often show crinosity tumour,close to capsula fibrosa,heterogeneous density.Cystic degeneration and necrosis are very obvious.After contrast enhancement,substantial part of the tumor is enhancement gradually.However,the verification of the diagnosis should be based on the histopathological and immunohistochemical examinations.更多还原