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<p>Since the 1990s, the incidence of early-onset colorectal cancer (EOCRC) and other cancers sharing risk factors with CRC, has been increasing in numerous countries, particularly in high-income settings. This increase shows a birth cohort effect, possibly due to a progressive Westernization of lifestyles resulting from exposure to risk factors during early life, with their delayed effects on incidence. Until 2016, in Spain, the increase in the incidence of EOCRC was limited to those aged 20–29&#xa0;years, and this phenomenon may gradually affect older age groups, albeit later than in other Western countries. Although the absolute number of EOCRC cases is low, the increasing incidence in younger age groups indicates changes in risk factor exposure and likely heralds an increase in the future cancer burden. This increase highlights the need for research, diagnosis, treatment, public health awareness, and initiatives to mitigate the growing burden of EOCRC, but does not justify, at this time, reducing the age at which screening begins.</p>

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Incidence trends of colorectal cancer in young adults in Spain

  • 期刊论文

  • 发表日期：

    2025年7月29日

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  • Jaume Galceran

摘要

Since the 1990s, the incidence of early-onset colorectal cancer (EOCRC) and other cancers sharing risk factors with CRC, has been increasing in numerous countries, particularly in high-income settings. This increase shows a birth cohort effect, possibly due to a progressive Westernization of lifestyles resulting from exposure to risk factors during early life, with their delayed effects on incidence. Until 2016, in Spain, the increase in the incidence of EOCRC was limited to those aged 20–29 years, and this phenomenon may gradually affect older age groups, albeit later than in other Western countries. Although the absolute number of EOCRC cases is low, the increasing incidence in younger age groups indicates changes in risk factor exposure and likely heralds an increase in the future cancer burden. This increase highlights the need for research, diagnosis, treatment, public health awareness, and initiatives to mitigate the growing burden of EOCRC, but does not justify, at this time, reducing the age at which screening begins.