Colorectal Cancer Screening and Detection

Colorectal cancer develops from abnormal growths called polyps in the lining of the colon or rectum, and it remains one of the leading causes of cancer death worldwide despite being highly preventable when caught early. Screening programs—most prominently colonoscopy, which allows clinicians to both detect and remove polyps before they become malignant—have driven meaningful reductions in incidence and mortality in countries where they are widely adopted, though uptake remains uneven across populations and healthcare systems. Researchers are actively working to refine who should be screened, at what age, and how often, weighing the benefits of earlier or more frequent detection against the costs, risks, and burden placed on patients. Open questions include how best to integrate emerging tools such as stool DNA tests and artificial intelligence-assisted image analysis into clinical practice, and why certain demographic groups face persistently higher rates of late-stage diagnosis despite the availability of effective screening.

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Keywords

Colorectal CancerScreeningColonoscopyPolypsIncidenceMortality