Why Are So Many People Being Diagnosed With Thyroid Cancer?
Association between screening and the thyroid cancer “epidemic” in South Korea: evidence from a nationwide study
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Screen-detected cases increased 56-fold, while deaths stayed flat.
Most people assume more cancer diagnoses mean better detection and prevention—this study flips that: more diagnoses = more noise, not more lives saved.
Practical Takeaways
If you’re offered a routine thyroid ultrasound with no symptoms, ask: ‘Will this change my treatment or survival? If not, why do it?’
Not medical advice. For informational purposes only. Always consult a healthcare professional. Terms
Surprising Findings
Screen-detected cases increased 56-fold, while deaths stayed flat.
Most people assume more cancer diagnoses mean better detection and prevention—this study flips that: more diagnoses = more noise, not more lives saved.
Practical Takeaways
If you’re offered a routine thyroid ultrasound with no symptoms, ask: ‘Will this change my treatment or survival? If not, why do it?’
Publication
Journal
The BMJ
Year
2016
Authors
Sohee Park, C. Oh, Hyunsoon Cho, J. Lee, K. Jung, J. Jun, Y. Won, H. Kong, K. Choi, You Jin Lee, Jin-Soo Lee
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Claims (8)
Finding and treating very slow-growing cancers through aggressive screening doesn’t help people live longer overall — it just finds cancers that wouldn’t have hurt them anyway.
Some cancers found during routine screening might never hurt you — they grow so slowly that you’d die of something else before they ever became a problem.
Getting everyone screened for thyroid cancer finds a lot of harmless lumps that would never hurt you, so more people are told they have cancer—but it doesn’t save any lives.
In South Korea, doctors started finding much smaller thyroid lumps between 1999 and 2008—even though these lumps were too tiny to feel or cause any problems. This suggests they’re being found by accident during scans or tests done for other reasons.
In South Korea, more people were diagnosed with tiny thyroid lumps between 1999 and 2008—not because more people got sick, but because doctors started scanning for them more often with fancy tests.