ASCO 2015:于金明院士点评大会报告LBA4--全脑放疗可以显著改善脑转移癌控制

2015-06-07 王迈 中国医学论坛报

尽管在放射外科(SRS)后行全脑放疗(WBRT)可以显著改善脑转移癌控制,但是鉴于其在神经认知方面的风险,辅助WBRT的地位仍被质疑。这项由NCI赞助的多中心III期临床研究,再次评估了SRS基础上增加WBRT治疗1~3个脑转移癌的疗效,结果发现,增加WBRT导致患者认知功能(尤其是即时回忆、记忆和语言交流)的下降,且不改善总生存。因此建议,SRS治疗后密切监测应该是此类患者的治疗选择。为此中国医

尽管在放射外科(SRS)后行全脑放疗(WBRT)可以显著改善脑转移癌控制,但是鉴于其在神经认知方面的风险,辅助WBRT的地位仍被质疑。这项由NCI赞助的多中心III期临床研究,再次评估了SRS基础上增加WBRT治疗1~3个脑转移癌的疗效,结果发现,增加WBRT导致患者认知功能(尤其是即时回忆、记忆和语言交流)的下降,且不改善总生存。因此建议,SRS治疗后密切监测应该是此类患者的治疗选择。为此中国医学论坛报特邀中国工程院院士、山东省肿瘤医院院长于金明对该研究进行了点评,同时一并为大家奉上美国哥伦比亚大学医学中心 Andre B. Lassmyyn教授在报告会上就该研究的现场讨论内容。

专家点评

中国工程院院士、山东省肿瘤医院院长于金明

针对1~3个脑转移是做立体放射外科治疗,还是做辅助的全脑照射,是一个由来已久的话题,因为各有证据。N0574研究的结果提示,WBRT提高了局部控制率,但是对OS没有帮助。这是在意料之中的。研究者的态度很明确——不建议进行辅助WBRT,而讨论者的态度似乎是倾向于做辅助WBRT,并列举了WBRT的诸多优点。我认为,在临床中,脑转移的治疗应该结合多因素(患者、疾病、治疗)进行个体化考量。

例如,一位年龄较大的患者、肿瘤类型预后较差、原发肿瘤控制不好,脑转移治疗的原则是低姑息(只照射转移灶);但是,如果患者年轻、一般情况好、肿瘤类型预后较好,为了避免脑转移瘤病灶增多以及次生转移的发生,局灶治疗后如果患者的一般情况较好,可以考虑辅助WBRT。

此外,除WBRT外,与SRS配合治疗脑转移的可选方式还可以包括:药物,例如分子靶向药物、免疫治疗;特殊的放疗模式,海马保护WBRT(HA-WBRT);一些化学药物与放疗合用也可以起到保护作用。

现场讨论

美国哥伦比亚大学医学中心 Andre B. Lassman教授:

N0574研究发现,WBRT后持续神经系统损害可达12个月,且WBRT对认知功能产生的副作用可能更甚于复发脑转移,而既往的一些研究则显示相反的结果。对于这一看似矛盾的现象,可能的解释如下。SRS后的脑转移的复发率在不同研究间存在差异,在N0574研究中为50%左右,而在既往研究中为73%~78%(如JROSG 99-1研究、EORTC 22952-26001研究)。SRS后的脑转移发生率很低,需要长期随访。各研究均未将>3个月的认知功能障碍作为主要研究终点,因而用于分析的样本量均较小(N0574:34例;JROSG 99-1:20;MGd:9)。研究中使用不同的评估工具。最后,需要特别注意的,脑转移的部位是其对神经系统损伤的影响因素之一。

因此,对于N0574研究患者所提出的结论,可以有另一种表述方式:辅助WBRT可以在特定人群中改善生存;如果避免WBRT,再次发生脑转移后,仍可能影响患者认知功能,当然N0574研究提示,相比之下,WBRT可能导致更差的结果;WBRT或可在经过选择的患者中使用,例如脑转移瘤危及生命时。

综上所述,无论是WBRT还是脑转移瘤复发,都可能会是造成功能恶化的原因,因此需要有替代的方法。

研究简介

该研究纳入213例增强磁共振成像(MRI)诊断的脑转移瘤患者(1~3个,每个肿瘤直径<3 cm),随机分组,给予SRS治疗或SRS+WBRT治疗,并在治疗前后进行认知功能的测试。研究的主要重点是认知进展(CP,3个月时6项认知测试中任一较基线降低>1个标准差(SD),同时估算至CP时间。

患者的中位年龄为60岁,且肺部原发癌最为常见(68%)。结果显示,3个月时的CP,WBRT + SRS组显著多于 SRS 组 (88.0%对61.9%,P=0.002)。其中,即时回忆(31%对8%,P=0.007),延迟回忆(51%对20%,P=0.002),语言流畅性(19%对2%,P= 0.02)受影响最为明显。

6个月和12个月的颅内肿瘤的控制率在SRS组为66.1%和50.5%,在联合治疗组为88.3%和84.9%(P<0.001)。中位总生存为SRS组10.7个月对SRS+WBRT组7.5个月(HR =1.02,P= 0.93)。

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    2015-07-30 kcb069
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    2015-08-02 quxin068
  5. [GetPortalCommentsPageByObjectIdResponse(id=1810503, encodeId=b4031810503e9, content=<a href='/topic/show?id=b14085134e6' target=_blank style='color:#2F92EE;'>#脑转移癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=85134, encryptionId=b14085134e6, topicName=脑转移癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=570c172, createdName=tigerlr98, createdTime=Tue Nov 24 16:54:00 CST 2015, time=2015-11-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2045786, encodeId=45d52045e8642, content=<a href='/topic/show?id=f3c2934568b' target=_blank style='color:#2F92EE;'>#转移癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93456, encryptionId=f3c2934568b, topicName=转移癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=87b1109, createdName=kcb069, createdTime=Thu Jul 30 04:54:00 CST 2015, time=2015-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1971065, encodeId=f1fd19e10656b, content=<a href='/topic/show?id=9e3f29635e3' target=_blank style='color:#2F92EE;'>#全脑放疗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=29635, encryptionId=9e3f29635e3, topicName=全脑放疗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1f1d390, createdName=feifers, createdTime=Tue Aug 18 14:54:00 CST 2015, time=2015-08-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1938497, encodeId=4c9f193849e6d, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Sun Aug 02 08:54:00 CST 2015, time=2015-08-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30087, encodeId=3fab3008e18, content=非常好,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ecf497512, createdName=tzf419, createdTime=Tue Jun 30 23:54:00 CST 2015, time=2015-06-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=26693, encodeId=f96c266935c, content=看看, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ee0d1618732, createdName=huaxipanxing, createdTime=Tue Jun 09 19:20:00 CST 2015, time=2015-06-09, status=1, ipAttribution=)]
    2015-06-30 tzf419

    非常好,学习了

    0

  6. [GetPortalCommentsPageByObjectIdResponse(id=1810503, encodeId=b4031810503e9, content=<a href='/topic/show?id=b14085134e6' target=_blank style='color:#2F92EE;'>#脑转移癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=35, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=85134, encryptionId=b14085134e6, topicName=脑转移癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=570c172, createdName=tigerlr98, createdTime=Tue Nov 24 16:54:00 CST 2015, time=2015-11-24, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2045786, encodeId=45d52045e8642, content=<a href='/topic/show?id=f3c2934568b' target=_blank style='color:#2F92EE;'>#转移癌#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=36, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=93456, encryptionId=f3c2934568b, topicName=转移癌)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=87b1109, createdName=kcb069, createdTime=Thu Jul 30 04:54:00 CST 2015, time=2015-07-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1971065, encodeId=f1fd19e10656b, content=<a href='/topic/show?id=9e3f29635e3' target=_blank style='color:#2F92EE;'>#全脑放疗#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=41, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=29635, encryptionId=9e3f29635e3, topicName=全脑放疗)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=1f1d390, createdName=feifers, createdTime=Tue Aug 18 14:54:00 CST 2015, time=2015-08-18, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1938497, encodeId=4c9f193849e6d, content=<a href='/topic/show?id=1c292818fd' target=_blank style='color:#2F92EE;'>#ASC#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=32, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=2818, encryptionId=1c292818fd, topicName=ASC)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=74808, createdName=quxin068, createdTime=Sun Aug 02 08:54:00 CST 2015, time=2015-08-02, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=30087, encodeId=3fab3008e18, content=非常好,学习了, beContent=null, objectType=article, channel=null, level=null, likeNumber=65, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=ecf497512, createdName=tzf419, createdTime=Tue Jun 30 23:54:00 CST 2015, time=2015-06-30, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=26693, encodeId=f96c266935c, content=看看, beContent=null, objectType=article, channel=null, level=null, likeNumber=108, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=ee0d1618732, createdName=huaxipanxing, createdTime=Tue Jun 09 19:20:00 CST 2015, time=2015-06-09, status=1, ipAttribution=)]
    2015-06-09 huaxipanxing

    看看

    0

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