51年超1260万人数据:糖尿病罹患结直肠癌风险分析,有望改写指南

2020-12-31 MedSci原创 MedSci原创

糖尿病患者应将自己的结直肠癌筛查年龄适当提前,而对于有额外肠癌家族史的人而言,更应注意提前进行个体化筛查。

近日,世界卫生组织下属国际癌症研究机构(IARC)发布了2020年全球最新癌症负担报告。报告对2020年度全球常见的癌症类型、导致死亡主要癌症类型以及未来的癌症发展趋势进行了全面的分析。数据显示,2020年新发各类癌症共计1930万例,死亡近1000万例。

在该报告中,我们可以看到,结直肠癌(CRC)是全球第三大常见癌症,同时更是第二大癌症死亡原因,是占全球发病和死亡首位的消化系统恶性肿瘤。去年8月,美国《复仇者联盟》系列电影饰演“黑豹”的好莱坞演员查德维克·博斯曼,因罹患结肠癌在洛杉矶家中去世,引得一波进行肠镜筛查的热潮。

CRC是一种可以预防的癌症。不可否认,自CRC筛查普及以来,包括肠镜等在内的筛查手段在老年人群体中卓有成效。基于美国的一项研究就表明,在引入肠筛查后,CRC的发病率有所下降。

然而,在未达到筛查年龄的中青年人中,CRC的发病率却正在增加。许多研究人员指出筛查指南应进行调整。同时,糖尿病和CRC有着共同的危险因素,都有发病逐渐年轻化的趋势,但糖尿病患者CRC罹患风险也至今未知。为此,由德国癌症研究中心领衔的研究对糖尿病患者罹患CRC的风险进行了全面的探讨。

研究人员使用了瑞典全国性的登记数据,随访时间为1964-2015年共计51年。共纳入12614256名初次随访年龄在0-107岁的有谱系信息的居民。随访期间,共有162226人罹患CRC,559375人罹患糖尿病,其中有18%(101135人)确诊糖尿病的年龄不到50岁。

进一步分析发现,以最常见的首次筛查年龄(50岁)作为临界值,50岁的男、女性10年CRC累积风险分别为0.44%与0.41%。同时,糖尿病患者比一般人群更早达到CRC筛查水平。

其中,男性糖尿病患者(确诊在50岁前)在45岁时即已达到0.44%的CRC风险(比推荐年龄提早5年),而女性则提早了4年。此外,对于有额外CRC家族史的人来说,根据性别和基准筛查其实年龄进行校正,风险增加更为明显。

男性与女性CRC累积风险与糖尿病和年龄的关系。

随后,将目光对准45岁的男女性发现10年CRC累积风险为0.25%。同样,男性糖尿病患者(确诊在45岁前)在40岁时即已达到一般人群45岁男性的CRC风险(比推荐年龄提早5年),而女性则提早了3年。

此外,更令人吃惊的是,与45岁时的一般人群相比,有糖尿病史及CRC家族史的患者风险提前了14年(31岁)

不同基准确定进行CRC首次筛查的年龄。

 

综上,该研究表明,糖尿病患者应将自己的结直肠癌筛查年龄适当提前,而对于有额外肠癌家族史的人而言,更应注意提前进行个体化筛查。

 

参考文献:

 

Ali Khan U, Fallah M, Sundquist K, et al. Risk of colorectal cancer in patients with diabetes mellitus: A Swedish nationwide cohort study. PLoS Med. 2020 Nov 13;17(11):e1003431. doi: 10.1371/journal.pmed.1003431.

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