50岁以下成人的直肠癌病例上升,与准则修改后更多的筛查有关。 Rising colorectal cancer cases in adults under 50 linked to more screenings after guideline changes.

2018年和2021年对准则进行了修改,将建议的筛查年龄降低到45岁,此后,新的研究将50岁以下成人的直肠癌病例上升与筛查增加联系起来。 New research links a rise in colorectal cancer cases among adults under 50 to increased screening, following guideline changes in 2018 and 2021 that lowered the recommended screening age to 45. 尽管早期诊断有所上升,但自1990年代以来年青成人癌症发病率上升的总体趋势仍然无法解释。 While early-stage diagnoses have risen, the overall trend of higher cancer rates in younger adults since the 1990s remains unexplained. 公共卫生专家强调筛查和认识诸如直肠出血和肠道习惯变化等症状的重要性。 Public health experts stress the importance of screening and awareness of symptoms such as rectal bleeding and changes in bowel habits.