Newsline
Jan 27, 2026

No. 1 cancer killer for people under 50 has gotten worse since 1990 — here’s your ‘best tool’ for beating it

Cancer deaths are falling among young Americans — except for one terrifying outlier.

Over the past 30 years, it has surged to become the top cancer killer of people under 50, overtaking breast, lung and brain cancers, as well as leukemia, a new analysis found.

“It is clear that this can no longer be called an old person’s disease,” Dr. Ahmedin Jemal, a senior author of the study and a top official at the American Cancer Society, said in a statement.

Bald man in a hospital bed looking at the camera.

In the study, researchers analyzed more than 1.2 million deaths and found that overall cancer mortality in Americans under 50 dropped 44% between 1990 and 2023.

The decline was driven by sharp drops in four of the five leading cancer killers, which fell by as much as 6% annually.

Only one increased: colorectal cancer, which rose 1.1% each year over the past three decades, climbing from the fifth most common cancer death to first place.

“The steady rise in colorectal deaths under 50 is even more alarming compared to the dramatic declines for lung and breast, even as breast cancer incidence is climbing,” said Rebecca Siegel, senior scientific director of surveillance research at the American Cancer Society and lead author of the report.

The findings come as overall colorectal cancer rates in young Americans continue to climb, even as cases in older adults — the group historically most affected — have been falling for years.

“While we await answers for why colorectal cancer rates are up, lives can be saved now through symptom awareness and destigmatization and more screening uptake, as 3 in 4 people under 50 are diagnosed with advanced disease,” Siegel said. 

Gastroenterologist in gloves pointing to human colon model with a pen.

Colonoscopies are considered the gold standard screening method for colorectal cancer, letting doctors detect disease and remove precancerous growths in one procedure.

While average-risk Americans were traditionally advised to start screening at 50, the American Cancer Society lowered its recommended starting age to 45 in 2018 amid the surge in cases among young people. Other major health bodies followed suit in subsequent years.

Now, doctors are urging young people to talk with relatives about their colonoscopy results.

“There are no risk factors that have been definitively concluded for early onset of colorectal cancer,” said Dr. Christine Molmenti, cancer epidemiologist and co-director of the Northwell Health Early-Onset Cancer Program, who was not involved in the study.

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