Blood test detects Stage 3 colon cancer in asymptomatic patient

A blood test detected Stage 3 colon cancer in a physician assistant who was asymptomatic and years away from her scheduled colonoscopy. The Shield test, a blood-based screening, identified cancer fragments in her bloodstream, prompting a follow-up colonoscopy that confirmed the diagnosis. This highlights the potential of less invasive screening for individuals who delay or avoid traditional colonoscopies. While colonoscopy remains the gold standard, this case suggests blood tests could play a crucial role in early detection, especially for those with prior polyps or who are overdue for screenings.