结节样周围型胆管细胞癌的CT和MRI表现

目的:分析结节样周围型胆管细胞癌(PCC)的CT和MRI表现及其病理基础.方法:15例经病理证实的结节样PCC患者,11例行多层螺旋CT平扫及动态增强扫描,6例行MRI平扫和动态增强扫描.结合病理结果分析其CT和MRI表现.结果:15例共检出病灶19个,直径(2.8±1.4)cm,于肝左、右叶均见分布.CT共检出15个病灶,增强扫描示14个病灶动脉期呈周边强化,门脉期显示8个病灶内对比剂向中央扩散强化,6个病灶未见上述强化方式;1个病灶CT动态增强扫描呈"快进快出"改变.4个病灶见邻近肝包膜凹陷,2个病灶伴随胆管轻度扩张.6例MRI共检出6个病灶,T2WI示5个病灶呈不规则低信号,动态增强扫描示相应区域均见强化;另1例病灶增强扫描动脉期有异常强化,门脉期及延迟期呈等信号.结论:结节样周围型胆管细胞癌的CT和MRI表现多样,与病灶内各种成分的比例和分布相关,其动态增强表现有一定特征性.

Analysis of CT and MRI Manifestations of peripheral Nodular Cholangiocarcinoma

Objective:To analyze the CT and MRI manifestations of peripheral nodular cholangiocarcinoma correlated with pathology.Methods:Of the fifteen cases with pathology proved peripheral nodular cholangiocarcinoma,11 cases underwent multiphase spiral CT scan without and with contrast enhancement,6 cases(2 of them had concurrent CT scan) underwent plain and dynamic enhanced MR examination.All the imaging features were correlated with pathology findings.Results:Of the 15 cases,totally 19 lesions were revealed,with t...