In 2024, the United States is projected to see over 2 million new cancer cases and more than 600,000 cancer deaths, highlighting the ongoing burden of this disease1 . While cancer mortality has steadily declined over the past three decades due to improved prevention and treatment, new cancer cases are rising, especially among young adults under 501 . This increase in early-onset cancers poses unique challenges for detection, treatment, and addressing disparities2 .
Cancer Deaths Decline While New Cases Increase
Cancer mortality rates in the U.S. have declined continuously through 2021, resulting in over 4 million deaths averted since 1991. This progress is largely attributed to reductions in smoking, earlier detection for certain cancers, and advances in treatment options3 1. Despite this encouraging trend, the incidence of new cancer cases is increasing for several common cancers, threatening these gains1 .
Between 2015 and 2019, annual incidence rates rose by 0.6% to 1% for breast, pancreas, and uterine corpus cancers, and by 2% to 3% for prostate, liver (in females), kidney, HPV-associated oral cancers, and melanoma3 1. Notably, colorectal cancer incidence in adults younger than 55 increased by 1% to 2% per year, and cervical cancer rates rose by 1.7% annually in women aged 30 to 443 1.
Young adults aged 18 to 49 are experiencing a rise in cancer diagnoses, with this age group being the only one to show an overall increase in cancer incidence from 1995 to 20202 4. Early-onset cancers often present more aggressively, and many individuals in this group fall below the recommended age for routine cancer screenings, leading to potential delays in diagnosis2 .
Key factors contributing to rising cancer rates in younger adults include:
- Obesity-related chronic inflammation, which promotes cancer development5 4
- Changes in reproductive patterns, such as earlier menstruation and delayed childbirth, increasing hormone exposure5
- Alterations in the gut microbiome that may facilitate tumor growth5 4
- Environmental exposures affecting generations born since the 1950s5
The number of early-onset cancer cases in adults under 50 is rising by 1% to 2% annually, with a forecasted 30% increase globally from 2019 to 2030. This trend is prompting medical groups to lower the recommended colorectal cancer screening age from 50 to 454 .
Disparities in Cancer Incidence and Outcomes
Cancer does not affect all populations equally. Persistent disparities exist in both incidence and mortality rates across racial and ethnic groups, complicating efforts to reduce the overall cancer burden3 1.
Progress is also hampered by wide persistent cancer disparities; compared to White people, mortality rates are two-fold higher for prostate, stomach, and uterine corpus cancers in Black people3 .
Compared to White Americans, Black Americans experience mortality rates that are approximately twice as high for prostate, stomach, and uterine corpus cancers. Similarly, Native American populations have twofold higher death rates for liver, stomach, and kidney cancers compared to White populations3 16. These disparities arise from multifactorial causes, including differences in access to care, socioeconomic factors, and biological variations3 .
Young adults with cancer face unique challenges related to diagnosis and treatment, including:
- Limited access to recommended screenings due to age or healthcare disparities2
- Delays in diagnosis leading to more advanced disease stages at presentation2
- Psychosocial concerns such as fertility preservation, body image, and family planning7 8
We have yet to identify any singular reason, although it’s likely related to a multitude of factors4 .
- Socioeconomic barriers limiting access to preventive services and treatment3
- Variations in health insurance coverage and healthcare utilization9
- Differences in tumor biology and genetic predispositions2
- Environmental exposures and lifestyle risk factors such as smoking and obesity3
Future Cancer Trends from ACS Report
The American Cancer Society’s 2024 report highlights concerning shifts in cancer trends, particularly among younger adults. Colorectal cancer, once the fourth-leading cause of cancer death in men and women under 50 in the late 1990s, has now become the leading cause of cancer death in men and the second leading cause in women in this age group3 12.
Breast cancer subtypes that are more aggressive, such as triple-negative and HER2-positive, are more common in young women, contributing to poorer prognoses5 2. Additionally, nearly one-third of colorectal cancers diagnosed before age 50 are linked to family history or genetic predisposition, underscoring the importance of genetic counseling and testing in younger patients6 .
It's such an important question, and it points to the need for more research in all kinds of domains2 .
The report projects that cancer incidence will continue to rise for multiple cancers, including breast, prostate, uterine, pancreatic, kidney, and melanoma1 6. Behavioral risk factors such as obesity, smoking, alcohol use, and diet remain modifiable contributors to cancer risk, but exact population-attributable fractions are not yet fully defined3 .
- Many young adults are diagnosed before reaching the recommended screening ages, delaying early detection2 4
- Screening tools like colonoscopy, Pap smears, HPV vaccination, and low-dose CT scans for lung cancer are effective but underutilized in underserved populations3
- Expanding screening guidelines, such as lowering the colorectal cancer screening age to 45, aim to address rising early-onset cancers5 4
| Cancer Type | Annual Incidence Increase (2015–2019) | Notes on Young Adults and Disparities |
|---|---|---|
| Breast | 0.6%–1% | Aggressive subtypes more common in young women5 2 |
| Pancreas | 0.6%–1% | Rising incidence in younger adults3 4 |
| Uterine Corpus | 0.6%–1% | Mortality rates twice as high in Black Americans3 |
| Prostate | 2%–3% | Incidence 70% higher in Black men10 |
| Liver (female) | 2%–3% | Higher mortality in Native American populations3 6 |
| Kidney | 2%–3% | Disparities in Native American groups3 |
| HPV-associated oral | 2%–3% | Increasing incidence3 |
| Melanoma | 2%–3% | Rising incidence3 |
| Cervical (ages 30–44) | 1.7% | Increasing incidence in young women3 |
| Colorectal (<55) | 1%–2% | Leading cause of cancer death in men <503 1 |
