Ideas in this flowchart

• Colorectal cancer progression can become a prevention opportunity through regular screening.
• Colorectal cancer typically develops over several years.
• The process begins with polyps forming in the intestinal lining.
• Polyps form long before they become malignant.
• Slow progression is not reassuring by itself.
• The gradual process is meaningful only if its window is used.
• Regular screening during this window uses the opportunity.
• Screening converts gradual biological progression into a preventable disease.