New Cancer Statistics Reveal Unexpected Shifts in Who Gets Sick

The Great Reversal: Why Cancer Is Becoming a Woman’s Disease

For decades, cancer was a man’s story. Men smoked more. Men died more. Men got the disease at higher rates across nearly every age group. That narrative is now officially obsolete.

In 2021, for the first time on record, women between the ages of 50 and 64 had a slightly higher cancer incidence rate than men of the same age: 832.5 versus 830.6 per 100,000 people (Siegel et al., 2025). That gap is tiny but historic. It is the visible tip of a much larger shift.

The real shock is in younger adults. Among people under 50, women now have an 82% higher cancer incidence rate than men: 141.1 versus 77.4 per 100,000 (Siegel et al., 2025). In 2002, that gap was 51%. In two decades, it has grown by more than half. Something fundamental is changing in who gets cancer and why.

This is not a slow, gradual trend. It is a pivot.

The American Cancer Society’s annual report, published in January 2025 by Rebecca Siegel, Tyler Kratzer, Angela Giaquinto, and Hyuna Sung in CA: A Cancer Journal for Clinicians, projects 2,041,910 new cancer cases and 618,120 cancer deaths in the United States this year. The headline news is good: the cancer mortality rate has dropped by 34% since 1991, averting nearly 4.5 million deaths (Siegel et al., 2025). But beneath that progress, the data reveals two alarming patterns that threaten to undo decades of work. One is a new epidemic of cancer in younger women. The other is a persistent, brutal racial divide that has barely budged.

The Numbers That Changed the Story

The researchers compiled data from central cancer registries through 2021 and mortality data through 2022. They used statistical models to project 2025 case counts. The methodology is standard for this annual report, which has been tracking cancer trends in the U.S. for decades. What is not standard is what the numbers show.

The male to female incidence rate ratio has collapsed from 1.6 in 1992 to 1.1 in 2021 (Siegel et al., 2025). That means men used to get cancer 60% more often than women. Now the difference is down to 10%. And in several key age groups, women have pulled ahead.

The most striking reversal is in lung cancer. For the first time, women under 65 now have a higher lung cancer incidence rate than men of the same age: 15.7 versus 15.4 per 100,000 (Siegel et al., 2025). This is not a statistical fluke. The p value is 0.03, meaning there is only a 3% chance this difference is random. Lung cancer has been a male dominated disease for as long as anyone has tracked it. That is no longer true for younger adults.

Why? The answer is not complicated, but it is uncomfortable. Smoking rates peaked later in women than in men, and they declined more slowly. Women who started smoking in the 1960s and 1970s are now in their 60s and 70s. But that only explains part of the shift. The rise in cancer among younger women involves cancers that have nothing to do with smoking.

Breast cancer is the largest driver. It accounts for roughly 30% of all new cancer diagnoses in women. Incidence rates for breast cancer have been creeping up by about 0.6% per year since the mid 2000s (Siegel et al., 2025). But the authors found increases in several other cancers among younger women, including thyroid, melanoma, and colorectal cancer. The pattern is broad, not narrow.

The Age Puzzle: Why Young Women Are Getting Sick

This is the part that keeps oncologists up at night. Cancer is fundamentally a disease of aging. Your cells accumulate mutations over decades. The older you are, the more likely something goes wrong. That is why most cancer diagnoses come after age 65.

But the data shows that cancers normally seen in older people are now appearing in younger women. Colorectal cancer is the clearest example. It has been rising in people under 50 for years, and the increase is steeper in women than in men (Siegel et al., 2025). The same pattern holds for several other gastrointestinal cancers.

The authors do not have a single explanation. They point to several plausible drivers: changes in reproductive patterns, rising obesity rates, shifts in diet, and environmental exposures. Women today have fewer children and have them later. They use hormonal contraceptives more. They are more likely to be obese than men, and obesity is a known risk factor for at least 13 types of cancer. But none of these factors alone explains the magnitude of the shift.

What makes this particularly unsettling is that the trend is accelerating. The 82% higher incidence in young women compared to young men is up from 51% in 2002 (Siegel et al., 2025). That is not a plateau. That is a slope.

The Racial Divide That Will Not Close

If the gender shift is surprising, the racial disparities are infuriating. They are not new. They have been documented for decades. And they are barely improving.

Native American people now bear the highest cancer mortality of any racial or ethnic group in the United States. The authors found that Native Americans have death rates two to three times higher than White people for kidney, liver, stomach, and cervical cancers (Siegel et al., 2025). These are not rare cancers. These are preventable and treatable diseases when caught early.

Black people face a similar burden. They have twice the mortality rate of White people for prostate, stomach, and uterine corpus cancers (Siegel et al., 2025). The gap for prostate cancer is particularly stark. Black men are about 70% more likely to be diagnosed with prostate cancer than White men, and more than twice as likely to die from it (Siegel et al., 2025).

The authors are careful to note that these disparities are not driven by biology. They are driven by access. Native American and Black communities have less access to screening, less access to high quality treatment, and higher rates of poverty. They are more likely to be diagnosed at later stages, when treatment is less effective. They are less likely to receive guideline concordant care.

The report projects that in 2025, cancer will kill roughly 618,000 Americans. That is about 1,700 people per day. The decline in the overall mortality rate is real and meaningful. But if you are Native American or Black, that decline has been slower and smaller.

What the Study Does Not Prove

The authors are transparent about the limits of their data. Cancer registry data is always a few years behind. The most recent incidence numbers are from 2021, and the mortality numbers are from 2022. The projections for 2025 are statistical estimates, not certainties.

More importantly, the study cannot tell us why the gender gap is closing and reversing. It can describe the pattern with precision. It cannot identify the cause. The authors suggest several hypotheses, but they are careful not to claim certainty.

One open question is whether the rise in young women is driven by increased screening. Better detection could explain some of the increase, especially for breast cancer. But it does not explain the rise in colorectal cancer, where screening rates are actually lower in young adults. It also does not explain why the increase is happening across multiple cancer types.

Another open question is whether environmental exposures are playing a role. There is growing evidence that chemicals in food, water, and consumer products can disrupt hormones and increase cancer risk. Women may be more exposed to some of these chemicals through cosmetics, personal care products, and food packaging. But the evidence is not yet strong enough to draw firm conclusions.

The authors also note that the COVID 19 pandemic disrupted cancer screening and diagnosis in 2020 and 2021. Some cancers that would have been caught early were missed. That may have temporarily depressed incidence numbers. The full impact of those missed diagnoses will not be clear for several years.

What This Actually Means

The annual cancer statistics report is not a call to panic. It is a call to pay attention. Here is what the data demands of us, as individuals and as a society.

• ▸Young women need to take cancer risk seriously. The narrative that cancer is an old person's disease or a man's disease is outdated. Women under 50 now have nearly double the cancer incidence of men their age. If you are a woman in your 30s or 40s, pay attention to your body. Do not dismiss symptoms like unexplained weight loss, persistent bloating, or changes in bowel habits. They may be nothing. They may be something.

• ▸Lung cancer is no longer a man's disease. The historic gap has closed in people under 65. If you are a woman who smokes or has smoked, you are at risk. Screening with low dose CT scans is available for high risk individuals. Ask your doctor if you qualify.

• ▸Racial disparities are not inevitable, but they require action. The data shows that Native American and Black communities bear a disproportionate burden of cancer deaths. These are not biological facts. They are consequences of unequal access to prevention, screening, and treatment. Closing these gaps requires systemic change: better insurance coverage, more community based screening programs, and investment in healthcare infrastructure in underserved areas.

• ▸The obesity epidemic is a cancer epidemic in waiting. Obesity is linked to at least 13 cancers, and rates are rising in both men and women. The increase in cancer among young women may be partially driven by rising obesity rates. This is not about body shaming. It is about recognizing that metabolic health matters for cancer prevention.

• ▸Progress is real, but fragile. The 34% decline in cancer mortality since 1991 is one of the great public health achievements of the last half century. But that progress is concentrated in older adults and in cancers that are screenable or treatable. The rise in young women and the persistence of racial disparities are warning signs that the next decade may look very different from the last one.

The authors end their report with a simple statement: continued progress will require investment in prevention and equitable treatment. That sounds like a bureaucratic platitude. It is not. It is a direct challenge to a system that has made remarkable advances for some people while leaving others behind. The data is clear. The question is whether we are willing to act on it.