European Radiology:成人进行CT扫描会导致甲状腺癌风险的增加吗?

2021-11-18 shaosai MedSci原创

在过去的20年中,甲状腺癌的发病率在全球范围内迅速增加。甲状腺癌是一种辐射相关的实体癌,其发病率在原子弹爆炸和切尔诺贝利核事故的幸存者中显著增加。

在过去的20年中,甲状腺癌的发病率在全球范围内迅速增加。甲状腺癌是一种辐射相关的实体癌,其发病率在原子弹爆炸和切尔诺贝利核事故的幸存者中显著增加,最有说服力的一项假说认为这是由于高剂量电离辐射暴露造成的。然而,由于原子弹爆炸或切尔诺贝利灾难中辐射暴露的类型和程度与医学调查中的不同,这一假设是值得商榷的。

最近的一些研究直接评估了诊断性低剂量电离辐射暴露与甲状腺癌风险之间的关系。有趣的是,许多儿科队列研究显示,在儿童时期暴露于CT扫描后与未暴露相比,甲状腺癌的发病率更高。然而,临床上对这些研究结果存在较大争议

近日,发表在European Radiology杂志的一项研究评估成年后的CT扫描与新诊断的甲状腺癌之间的关联,以及医疗保健的不同获取率这种关联的解释为临床上进一步明确医疗检查与甲状腺癌之间的管=关系提供参考为规范化检查的制定提供了有力的支持

本研究对3557名成年甲状腺癌病例与17785名对照组按年龄、性别和诊断日期进行了匹配。估计了与癌症诊断前>3年的CT扫描累积暴露相关的甲状腺癌的比率(ORs)。评估了在调整门诊频率和不调整门诊频率的情况下估计ORs的变化。 

新诊断的甲状腺癌的ORs随着CT扫描总数和暴露甲状腺的CT扫描(头部、颈部或胸部的CT扫描;OR和95%置信区间[CI],分别为1.09[1.03-1.16]和1.28[1.05-1.57])的增多而增加甲状腺癌的OR值根据较高的门诊频率而增加在模型中调整门诊频率后,甲状腺癌发病率和CT扫描之间的关联变得不明显(OR[95% CI],1.03[0.97-1.10]:总CT扫描,1.14[0.93-1.41]:甲状腺暴露的CT扫描)。按年龄、性别和其他恶性肿瘤史分层的亚组分析没有发现CT扫描和甲状腺癌之间的独立关联。 



表 在年龄和性别分类的亚组中,每次CT扫描的甲状腺癌概率与CT扫描的数量有关。

本研究表明,考虑到医疗保健的利用率,在普通人群中,成年时期进行的CT扫描与甲状腺癌的发展没有独立的联系。CT扫描的电离辐射不太可能是导致成人甲状腺癌发病率增加的主要原因。因此,临床医生不必因为担心增加甲状腺癌的风险成年患者必要的CT扫描进行有所负担

原文出处

Young Ki Lee,Sangwon Lee,Eun Kyung Lee,et al.Can computed tomography scanning in adults lead to an increased risk of thyroid cancer? A nationwide nested case-control study.DOI:10.1007/s00330-021-08186-0

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    2022-10-18 feather89
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    2022-08-30 sjq027
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    2021-11-18 ms3000000011248535

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