Radiology:颅脑MRI对早期非小细胞肺癌患者来说是否多此一举?

2022-07-08 shaosai MedSci原创

据统计,约有10%-20%的非小细胞肺癌(NSCLC)患者在初次发病时就发现有脑转移,而且转移性病灶的出现与不良预后密切相关。

在非小细胞肺癌(NSCLC)患者中,大脑是最常受影响的胸外器官。约有10%-20%的患者在初次发病时发现有脑转移,而且转移性病灶的出现与不良预后密切相关。由于积极治疗脑转移和原发癌与生存率有关,因此大多数分期指南建议对晚期NSCLC进行常规脑部MRI检查。

据我们所知,对于早期NSCLC是否应该进行脑部影像学检查目前尚无共识。有学者认为,对于无症状的IA期(临床T1N0)NSCLC期的患者来说分期脑成像不必要。Tanaka等学者报道,T1N0 NSCLC的脑转移率只有0.7%,其中67%是有症状的。

近日,发表在Radiology杂志的一项研究在一个单中心的无症状IA期NSCLC患者的回顾性队列中探讨了分期脑部MRI检查对患者的生存益处,为规范临床诊治流程提供了有价值的参考依据。

本项研究回顾性纳入2009年2月-2016年3月期间接受根治性切除的临床TNM分期T1N0M0 NSCLC的患者,记录了患者的生存情况和术后监测期间脑转移的发展。分别采用Cox回归和Fine-Gray次分布险模型进行多变量调整,比较了接受手术的患者有无分期脑MRI的累积生存率和脑转移发生率。倾向性评分匹配和治疗加权的反概率被应用于混淆因素的调整。

共纳入628名患者(平均年龄,64岁±10[SD];319名男性),其中53%(628人中的331人)进行了脑部MRI分期检查。在多变量分析中,脑部MRI对无脑转移生存期(危险比[HR],1.06;95% CI:0.69,1.63;P = .79)、脑转移时间(HR,1.60;95% CI:0.70,3.94;P = .29)和总生存期(HR,0.86;95% CI,0.54,1.37;P = .54)没有显示预后优势。经过倾向性评分匹配(无脑转移生存期[HR, 0.97; 95% CI: 0.60, 1.57; P = .91],脑转移时间[HR, 1.29; 95% CI: 0.50, 3.33; P = .60]、总生存期[HR, 0.89; 95% CI: 0.53, 1.51; P = .67])和治疗加权的反概率得到一致的结果。


 73岁女性,没有进行分期脑部MRI检查。(A) 患者因胸部CT扫描发现2.6厘米大小的肺腺癌而接受了右下肺切除术,但没有进行术前脑部MRI检查。(B) 在术后3年因记忆障碍而获得的脑部MRI扫描中,在左额叶有一个6.7厘米的囊性肿块。手术切除后,该肿块被证实为转移瘤。该患者在5年后被剔除(脑转移时间,35.3个月;总生存期,65.4个月)

本研究表明,无症状的临床IA期非小细胞肺癌患者在接受不接受分期脑部MRI检查 的情况下,在无脑转移生存期、脑转移时间和总生存期方面没有差异。

 

原文出处:

Ju G Nam,Hyunsook Hong,Seung Hong Choi,et al.No Prognostic Impact of Staging Brain MRI in Patients with Stage IA Non-Small Cell Lung Cancer.DOI:10.1148/radiol.212101.

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    2022-07-08 jing0309

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