肝外胆管癌的多期螺旋CT评价

Evaluation of extrahepatic cholangiocarcinoma with multiphasic MSCT

目的探讨肝外胆管癌的CT表现并评价其诊断价值。方法收集2004年10月至2009年8月经手术病理证实肝外胆管癌42例,所有患者均行16层螺旋CT(MSCT)平扫及动脉期、门静脉期、延迟期三期增强扫描。对MSCT各期中肝外胆管癌的显示率、影像表现进行回顾性分析。结果 42例中动脉期、门脉期和延迟期中度以上强化分别为26例、41例和42例。32例根治性手术患者中,MSCT显示肝外胆管癌平均长径18.1±6.3 mm,术后大体标本为20.3±9.5 mm。结论多期MSCT扫描可以较为准确显示肝外胆管癌的位置及范围,在肿瘤术前诊断中具有重要的价值。

Objective To discuss the CT findings of extrahepatic cholangiocarcinomas（EHCCs） and their significance for the diagnosis.Methods Forty-two patients with surgically and pathologically proved EHCC,who were collected beteen October 2004 and August 2009 underwent multiphasic 16-slce spiral computed tomography（MSCT） scans which comprised precontrast plain scans and contrast-enhanced arterial phase,portal venous phase,and delayed phase scans.The detection rate and findings of EHCCs in all patients on various phase CT images were analyzed retrospectively.Results Among 42 cases,the middle or over enhancement of EHCC lesions during arterial,portal venous,and delayed phase was found in 26,41 and 42 cases,respectively.In 32 patients who underwent the radical surgery,the mean longitudinal extent of EHCCs visualized on MSCT was 18.1±6.3 mm,while that on pathologic specimens was 20.3±9.5 mm.Conclusion Multiphasic MSCT scanning could accurately show the location and extent of EHCCs so that it has important significance for the preoperative diagnosis.