European Radiology:使用MRI评价钇-90放射栓塞治疗对肝细胞癌的反应

2022-08-22 shaosai MedSci原创

Yttrium-90 (90Y) 经动脉放射栓塞术 (TARE) 是一种不断发展的 LRT 技术,可作为手术切除或移植前的新辅助治疗以及伴有大血管侵犯的晚期 HCC 病例。

肝细胞癌(HCC)是最常见的原发性肝脏恶性肿瘤,占所有肝脏恶性肿瘤病例的90%,是全球癌症相关死亡的第二大原因。根据巴塞罗那临床肝癌 (BCLC) 现行指南诊断为早期 HCC 的患者可以通过手术切除、射频消融或肝移植进行治愈性治疗 。

然而,由于晚期肿瘤分期和/或背景肝病,80% 的患者在 HCC 诊断时不符合治愈性治疗的条件。在过去的二十年中,临床上已开发出针对晚期 HCC 或对不适合肝移植的患者具有治愈前景的多种局部疗法 (LRT) 。 LRT 还可用于肿瘤降期,使患者符合移植条件。Yttrium-90 (90Y) 经动脉放射栓塞术 (TARE) 是一种不断发展的 LRT 技术,可作为手术切除或移植前的新辅助治疗以及伴有大血管侵犯的晚期 HCC 病例。

众所周知由于病变可表现出异质性坏死,并且通常在开始时大小没有显著的减小,因此LRT 后反应的放射学评估具有挑战性。在 LRT 技术中, 因为TARE发射的辐射可能会增加血流量,这可能会转化为治疗区域的强化增强(所谓的辐射效应),这可能使得肿瘤残余的评估愈发的困难

近日,发表在European Radiology杂志的一项研究使用组织病理学作为参考标准,评估了钆塞酸二钠增强 MRI 对预测TARE治疗后HCC完全病理性坏死 (CPN) 的诊断性能,为临床准确评估治疗反应提供了参考依据。

项回顾性研究纳入了 48 名接受TARE治疗的HCC 患者(男/女:36/12,平均年龄:62 岁),每位患者均在手术后90天内进行钆塞酸二钠MRI 扫描。两名放射科医师使用 RECIST1.1、mRECIST、EASL 和 LI-RADS-TR 标准评估肿瘤反应,并评估晚期动脉期、门静脉期和肝胆期 (AP/PVP/HBP) 减影坏死百分比。统计分析包括读者间一致性、放射学和病理学坏死百分比之间的相关性,以及使用逻辑回归和 ROC 分析预测 CPN。

组织病理学显示71个HCC(2.8 ± 1.7 cm,范围:0.5-7.5 cm),其中42个有 CPN,22个有部分坏死,7个没有坏死。EASL和 AP/PVP减影时肿瘤坏死百分比是CPN的独立预测因子(p = 0.02-0.03)。坏死百分比、mRECIST、EASL和LI-RADS-TR在诊断 CPN 方面具有相当或良好的性能(AUC:0.78 - 0.83),对于阅读者2,减和LI-RADS-TR 之间存在显着差异。坏死的影像学百分比与肿瘤坏死的组织病理学程度显着相关(r = 0.66 - 0.8,p < 0.001)


 一名患有 HCV 肝硬化和肝右叶HCC(箭头)的58岁男性,接受了TARE 治疗,图中显示了未减影的图像(A:AP,B:PVP 和 C:HBP)。在图像减影中,观察者1和2分别在 AP (D)、PVP (E) 和 HBP (F) 上将肿瘤坏死评为 30%。请注意 PVP (E) 上的一些错误配准伪影。两位观察者的测量结果是 mRECIST:2.2/2.4 cm,EASL:3.8/4.3 cm2,LI-RADS:LR-TR可行(两位观察者),RECIST:2.9/3 cm。相应的大体病理图片显示直径约2.7 cm的 HCC(箭头),肝硬化中 30% 坏死(G)。相应的显微 H&E 图像(×10)显示存活的 HCC(箭头)和周围的部分坏死肿瘤(H)

本研究表明,减影(AP和PVP)和 EASL 标准是评估 CPN 的独立预测因子,在 经TARE 治疗的 HCC 中具有出色的 CPN 诊断性能。图像减影显示出良好的读者间一致性,并与组织病理学坏死程度显示出的较强相关性。

 

原文出处:

Naik Vietti Violi,Jeffrey Gnerre,Amy Law,et al.Assessment of HCC response to Yttrium-90 radioembolization with gadoxetate disodium MRI: correlation with histopathology.DOI:10.1007/s00330-022-08732-4

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    2023-01-05 feather89
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    2022-08-22 newyear929

    肝细胞癌化疗治疗效果比较差,但现在免疫加TKI,部分患者可以同时应用TACE,或者选择放疗,治疗已经较之前进步很多。这个课件又收获了很多知识。

    0

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    2022-08-23 huagfeg

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