European Radiology:混合型肝细胞胆管癌的LI-RADS M和LI-RADS 4/5风险分层

2022-07-19 shaosai MedSci原创

混合型肝细胞胆管癌(cHCC-CCA)具有复杂的成分及影像学表现,可被归入LI-RADS类别LR-4或LR-5或LR-M。

混合型肝细胞胆管癌(cHCC-CCA)是原发性肝癌的一个独特亚群,与肝细胞癌(HCC)和肝内胆管癌(iCCA)分化的成分有关,只占原发性肝癌的5%以下。根据其复杂的成分及影像学表现cHCC-CCA可被归入LI-RADS类别LR-4或LR-5(可能或肯定是HCC),或LR-M(可能或肯定是恶性观察,但不是特定的HCC)。

值得注意的是,在一项研究中,经组织病理学鉴定,HCC成分的比例是LI-RADS分类(LR-4/5或LR-M)的独立预测因素。一些研究报告称,与那些被归类为LR-M的患者相比,归类为LR-4/5的cHCC-CCA患者的预后相对较好。

尽管cHCC-CCA的预后与iCCA相似比HCC更差,但其中仍存在一个灰色地带。据我们所知,目前还没有研究探讨将cHCC-CCAs分层为LR-4/5和LR-M类别时的相应预后因素。近日,发表在European Radiology杂志的一项研究探讨了术前LI-RADS v2018影像学特征与临床病理特征在建立基于无复发生存(RFS)的风险分层方面的作用,为术前对患者进行准确的风险分层及预后预测提供了重要的参考依据。

本研究回顾性地确定了2015年6月至2020年11月在我院进行外科手术后被确认为cHCC-CCA的连续患者。两位放射科医生独立评估了术前的MR成像特征,并对每个病灶进行了LI-RADS分类,同时还收集了术前的临床数据。应用多变量Cox比例风险模型,分别确定与LR-M和LR-4/5的cHCC-CCAs复发相关的独立因素。在LR-M和LR-4/5中分别进行了风险分层。使用Kaplan-Meier生存曲线和对数秩检验来分析无复发生存率(RFS)和总生存率(OS)。 

最终共纳入131名符合2019年WHO分类标准的单一原发病灶的患者。在LR-M中,晕样强化、延迟中心强化和微血管侵犯(MVI)被确定为RFS的预测因素。马赛克样改变、CA19-9和MVI与LR-4/5的RFS独立相关。根据这些独立预测因素的数量,将患者分层为有利结果组(LR-ML亚组和LR-4/5L亚组)和不利结果组(LR-MH亚组和LR-4/5H亚组)。LR-ML、LR-MH、LR-5L和LR-5H的相应中位RFS为25.6个月、8.2个月、51.7个月和18.1个月。 


 一名57岁的男子,患有7.0厘米的cHCC-CCA,被归类为LR-M。a 病变在早期动脉期无强化;b 病变在晚期动脉期有边缘动脉期强化和晕样强化;c 病变在延迟期有延迟中心强化;d 病变在弥散加权成像中显示靶样弥散受限。该患者没有出现MVI

 

本研究分别确定了与LR-M和LR-4/5 cHCC- CCAs复发相关的风险因素,并对这两类患者进行了进一步的风险分层以更好地了解其预后情况。

 

原文出处:

Yi Wang,Gui-Qi Zhu,Chang-Wu Zhou,et al.Risk stratification of LI-RADS M and LI-RADS 4/5 combined hepatocellular cholangiocarcinoma: prognostic values of MR imaging features and clinicopathological factors.DOI:10.1007/s00330-022-08691-w

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    2023-01-09 xjy02
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    2022-10-01 zhanfl
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    2023-05-25 江川靖瑶
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    2022-12-22 feather89
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