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Initiatives for Reducing Cancer Mortality in Korea
Han-Kwang Yang
In one generation, Korea went from a country where roughly 90 percent of cancers were found at stage 3 or 4 to one where more than 70 percent are caught early. Professor Han-Kwang Yang walks...
In one generation, Korea went from a country where roughly 90 percent of cancers were found at stage 3 or 4 to one where more than 70 percent are caught early. Professor Han-Kwang Yang walks through how that happened, and why the number that matters most is not incidence but the ratio of deaths to cases.
Professor Yang, of Korea's National Cancer Center, lays out 25 years of national cancer control: the registry, the single national insurer, the anti-smoking laws, and an organized screening program that lifted participation from about 30 percent to over 77 percent. The through-line is that a country can face rising cancer incidence from an aging population and still drive mortality down, if detection moves earlier and the whole system is built to support it.
Key points for clinicians:
Cancer has been Korea's leading cause of death since 1980, and 2023 new-case counts are roughly triple those of 2000, driven by longer life expectancy. One in two men and one in three women will develop cancer.
On age-standardized rates the picture splits: thyroid, breast, prostate, and pancreatic cancers are rising, while gastric, colorectal, liver, and cervical cancers are falling.
Prevention shows up in the curves. Cutting the smoking rate by more than half, including a ban on smoking scenes in broadcast dramas, tracks with falling lung cancer, hepatitis B control tracks with a sharp drop in liver cancer, and cervical cancer has gone from the leading cause of cancer death in women to rare.
The national screening program covers gastric cancer by endoscopy every two years from age 40, plus breast, cervical, and colorectal (fecal occult blood) screening, with liver and lung screening for high-risk groups. Lung screening since 2019 uses low-dose CT read with AI assistance.
Organized screening moved stage at diagnosis earlier and lifted overall cancer survival to 73.7 percent, with Korea reporting among the world's lowest mortality-to-incidence ratios in gastric, colorectal (0.22), and breast cancer (0.08).
What is next is data-driven revision: population colonoscopy under study, gastric screening extended to age 74 with upper GI radiology dropped unless endoscopy is not possible, an H. pylori eradication trial with IARC and WHO, and liquid biopsy on the horizon. A registry that captures 97.4 percent of cancers makes those changes measurable.