肝包膜下脓肿的多层螺旋CT表现

目的:探讨肝包膜下脓肿的多层螺旋CT(MSCT)表现特征。方法:搜集5例经临床及穿刺证实的肝包膜下脓肿的CT资料,均经平扫及双期增强扫描,分析其CT表现。结果:全部病例均为单发病灶,共5个,4个位于肝右叶,1个位于肝左叶,2例有阑尾周围脓肿,1例合并同侧少量胸腔积液。平扫表现为肝包膜下新月形或类圆形低密度影,边界模糊,2个病灶内有点状气体影;增强后动脉期脓肿无强化,肝包膜增厚呈线状强化,灶周肝实质呈一过性肝段性强化,门静脉期脓肿呈水样低密度,边界清楚,一过性肝段性强化消失。结论:肝包膜下脓肿的MSCT表现具有特征性,增强扫描是确诊本病的首选方法。

MSCT Findings of Hepatic Subcapsular Abscess

Objective:To assess the multislice spiral CT (MSCT) features of hepatic subcapsular abscess.Methods:CT images of 5 patients with hepatic subcapsular abscess clinically proved were collected and analyzed retrospectively.All patients underwent both unenhanced and biphasic enhanced CT scanning.Results:All patients demonstrated single lesion on the MSCT.Lesions of four patients were on the right lobe and one on the left lobe.Among the five patients,two suffered from appendicitis with abscess and one had right pleural effusion.CT scan demonstrated hepatic subcapsular sickle-shaped hypodense area.Two lesions showed mottling gas in the abscess.On contrast-enhanced scan,there was no enhancement of the abscess while there was linear enhancement of hepatic capsule.Transient segmental enhancement was observed in arterial phase and disappeared in venous phase.Conclusion:MSCT scanning has characteristics in the diagnosis of hepatic abscesses,and enhanced CT scan is the first choice in the diagnosis of hepatic subcapsular abscess.