肝炎性假瘤16层螺旋CT表现分析

目的 研究肝炎性假瘤(IPL)的16层螺旋CT平扫及动态增强扫描表现. 方法 回顾性分析16例肝炎性假瘤的CT平扫及动态增强扫描表现,分别测量病灶及病灶周边肝组织的平扫及增强扫描各时相CT值,并对其进行比较. 结果 16例患者共发现18个病灶,病灶大多位于肝右叶,CT平扫表现为圆形、类圆形或不规则形状低密度影.增强扫描动脉期表现为无或仅为轻度强化,门脉期表现为轻到中度强化,部分病灶表现周边肝组织环形强化,或(及)病灶中心结节状或纤维条索状强化或(及)门静脉分支穿过病灶等特征性改变.统计学提示IPL病灶在动脉期的CT值增加与平扫比较不存在统计学差异(P＞0.05),门脉期的CT值增加与平扫及动脉期比较均存在统计学差异(P＜0.05);而病灶周边区域肝组织在平扫、动脉期及门脉期的CT值两两比较均存在统计学差异(P＜0.05).结论增强CT动态扫描显示IPL病灶整体呈少血供表现,以门脉期及延时期的CT表现最具特征性.

16-slice Spiral CT Analysis of the Inflammatory Pseudotumor of the Liver

Objective To study the CT characteristics of inflammatory pseudotumor of the liver(IPL).Methods 16-slice spiral CT findings of IPL in 16 cases were analysed retrospectively.The CT values of IPLs and the liver tissue surrounding the lesions were measured on plain and contrast-enhanced CT scans.Results Totally 18 lesions in 16 cases were detected by CT,most of them(16 lesions) located in the right lobes of liver.The lesions appeared as low-density,round or round-like,or irregularity in sharp.Dynamic enhanced CT scan showed the lesions no or slight enhancement in arterial phase,slight to moderate enhancement in portal vein phase.A part of the lesions showed ring enhancement surrounding the lesions,nodular or fiber stripped enhancement in the center of lesions,and the branches of the portal vein passesed through the lesions.In enhanced degree of the lesions,there was not statistical difference in arterial phase compared with plain CT scans,but there were statistical differences in portal-venous phase compared with plain scan and arterial phase.In the liver around the lesion,the enhanced degree had statistical difference in artery phase and portal-vein phase compared with plain CT scans.Conclusion Dynamic enhanced CT scan shows that IPL is of hypovascularity,it's of characteristic in the portal-venous phase and delayed phase.