胃肠胰腺腺癌肝转移伴与不伴神经内分泌分化的CT鉴别

摘要

目的 对比伴神经内分泌分化[NED(+)]与不伴神经内分泌分化[NED(-)]胃肠胰腺腺癌肝转移的CT表现,探讨其影像学特征及在鉴别诊断中的价值.资料与方法 收集2009年1月-2015年12月影像及病理资料完整的17例NED(+)的胃肠胰腺腺癌同时性肝转移患者,并于同期病例中筛选性别、年龄、原发部位匹配的34例NED(-)的单纯胃肠胰腺腺癌肝转移患者.评价两组肝转移灶数量、大小、分布、形态、增强特征,以及是否伴发腹水或淋巴结肿大.比较两组CT征象差异并判断诊断价值.结果 肝动脉期两组肝转移强化区域不同,NED(+)组环周强化比例高于NED(-)组(94.1％比44.1％),差异有统计学意义(P＜0.05);门静脉期两组肝转移强化变化特点不同,NED(+)组流出型病灶比例高于NED(-)组(41.2％比5.9％),而NED(-)肝转移灶平台型比例高于NED(+)组(91.2％比58.8％),差异均有统计学意义(P＜0.05).两组间其余CT征象差异无统计学意义(P＞0.05).Logistic回归分析显示肝动脉期强化区域、门静脉期强化变化是鉴别NED(+)与NED(-)胃肠胰腺腺癌肝转移的独立影响因素(P＜0.05).两征象联合判断胃肠胰腺腺癌肝转移的受试者工作特性曲线下面积为0.811(P＜0.05).结论 NED(+)与NED(-)胃肠胰腺腺癌肝转移的CT强化征象具有一定的差别,对鉴别诊断具有一定的参考意义.%Purpose To compare the CT features of hepatic metastases of gastro-entero-pancreatic adenocarcinomas with and without neuroendocrine differentiation [NED(+) and NED(-)] and to explore the value of CT features in differentiation of the two groups.Material and Methods From January 2009 to December 2015,abdominal CT scans of 17 pathologically proved cases of NED(+) gastro-entero-pancreatic adenocarcinomas with hepatic metastases and 34 pathologically proved cases of NED(-) hepatic metastases with sex,age and primary site matched were retrospectively reviewed.CT features including hepatic metastases number,size,distribution,shape and enhancement were assessed,as well as presence of lymphadenopathy or ascites.Differences of CT features between the two groups were analyzed.Results Compared with NED(-) group,hepatic metastases of NED(+) group more frequently demonstrated a peripheral enhancement on artery phase (94.1％ vs.44.1％,P＜0.05),and more washout on portal venous phase (41.2％ vs.5.9％,P＜0.05),while hepatic metastases of NED(--) group showed more plateau type (91.2％ vs.58.8％).There was no significant difference of other findings between the two groups (P＞0.05).Logistic regression revealed that enhancement area in hepatic artery phase and enhancement changes in portal venous phase were independent factors for differential diagnosis (P＜0.05).The area under the ROC curve of combining the two features was 0.811 (P＜0.05).Conclusion There are some different CT enhancement features between NED(+) and NED(-) hepatic metastases of gastro-entero-pancreatic adenocarcinomas,which are helpful in differential diagnosis.