Why Are 11 Cancer Types Increasing in England?

Cancer is no longer confined to older age, as new research reveals a steady rise among younger adults, raising concerns about modern risk factors and early-life influences.

Cancer, once largely associated with older age, is now increasingly being diagnosed in younger adults across England.
A major analysis by researchers from the Institute of Cancer Research and Imperial College London, with insights from Prof. Justin Stebbing, shows that 11 cancers are rising in people under 50.

In the UK, cases among those aged 25–49 have increased by about 25% since the early 1990s, with global studies pointing to an even sharper rise (1^✔ ✔Trusted Source
Temporal trends in behavioural risk factors for cancers with rising incidence in younger adults: an analysis of population-based data in England

Go to source).

What makes this trend concerning is its pattern. Many cancers are appearing earlier and sometimes at advanced stages, suggesting the rise is not just due to better detection. Even as traditional risks like smoking decline, cancer rates continue to increase, raising a key question: Are modern lifestyles, environmental exposures, and early-life factors driving cancer risk much earlier than expected?

Which 11 Cancers Are Increasing in Young Adults in England?

The England-based analysis (2001–2019), led by Dr. Montserrat García-Closas and colleagues and published in BMJ Oncology, identified 11 cancers with rising incidence in adults aged 20–49.

These include:

• Bowel (colorectal)
• Breast
• Pancreatic
• Kidney
• Liver
• Thyroid
• Ovarian
• Womb (endometrial)
• Oral (mouth)
• Gallbladder
• Multiple myeloma

Key findings from the England data:

• Most of these cancers are also increasing in older adults, but
• Bowel and ovarian cancers are rising only in younger people
• In several cases, rates are increasing faster in younger adults than in older groups

This aligns with global research, which reports rising rates of early-onset cancers across digestive, endocrine, reproductive, and metabolic systems worldwide (2^✔ ✔Trusted Source
Is early-onset cancer an emerging global epidemic? Current evidence and future implications

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).

Is Obesity the Main Driver Behind Rising Cancer Rates in England?

Among all known risk factors, obesity has emerged as the most significant contributor in England.

According to the analysis:

• Obesity is linked to 10 of the 11 cancers rising in younger adults
• It is the only major risk factor that has increased over time
• Other risks—smoking, alcohol, physical inactivity—have remained stable or declined

Supporting this, the research further reports that:

• Maintaining a healthy weight could prevent:
  • 20% of bowel cancers
  • 35% of endometrial cancers
  • 27% of kidney cancers

Biologically, obesity contributes to cancer through:

• Hormonal disruption (insulin, estrogen)
• Chronic inflammation
• Changes in cellular growth signals

However, obesity alone cannot explain the trend.

For example:

• In bowel cancer, only about 20% of additional cases are linked to excess weight, leaving the majority unexplained

As Dr. Montserrat García-Closas states:

“Excess weight is an important contributor, although it cannot fully account for the scale of the rise…”

What Other Factors Could Be Driving This Rise in Young People?

Because obesity is only part of the explanation, researchers are now exploring a broader and more complex set of influences—many of which begin early in life.

Diet and lifestyle changes

• Increased consumption of ultra-processed foods and sugary drinks
• Lower fiber intake
• Sedentary lifestyles

Environmental exposures

• Air pollution
• Industrial chemicals such as PFAS (“forever chemicals”)
• Long-term exposure to carcinogens

Gut microbiome changes

The gut microbiome—the ecosystem of bacteria in the digestive system—has changed significantly due to:

• Diet
• Antibiotic use
• Hygiene practices

These changes can influence inflammation, immunity, and cancer risk.

Early-life exposures

• Antibiotics in infancy
• Prenatal environmental exposure
• Earlier puberty and hormonal shifts

Sleep and circadian disruption

• Night-shift work
• Irregular sleep patterns affect hormone regulation

According to Nature Reviews Clinical Oncology, these combined influences form the “early-life exposome”, meaning total exposure from before birth through adulthood. (2^✔ ✔Trusted Source
Is early-onset cancer an emerging global epidemic? Current evidence and future implications

Go to source

)

This suggests that cancer risk may begin accumulating much earlier than previously thought.

Are These Cancers Truly Increasing—or Just Being Detected More?

At first glance, it may seem that rising cancer numbers in younger adults could simply reflect improvements in diagnostic tools and earlier detection.

Advances in imaging, screening technologies, and clinical awareness have undoubtedly made it easier to identify cancers that might previously have gone unnoticed.

However, the evidence from England suggests that this explanation is only part of the story. A key concern is that several cancers in younger adults are still being diagnosed at relatively advanced stages.

If the rise were driven purely by earlier detection, more cases would be caught at early stages. Instead, the presence of advanced disease at diagnosis points toward a genuine increase in cancer occurrence, not just improved identification.

This conclusion is further strengthened by the types of cancers involved. Many of the cancers showing rising trends in younger adults—such as colorectal and pancreatic cancers—do not have routine screening programs for people under 50.

This means that their increased incidence cannot be easily attributed to screening expansion. Taken together, these findings indicate that while better detection plays a role, it does not fully explain why more young adults are developing cancer.

What Does This Mean for Young Adults and Future Cancer Trends?

Although the overall risk of cancer in younger adults remains relatively low—around:

• 1 in 1,000 per year in younger adults
• 1 in 100 per year in older populations

The implications of this rising trend are significant. One of the most pressing challenges is delayed diagnosis.

Because cancer is still widely perceived as a disease of older age, both patients and healthcare professionals may not immediately suspect it in younger individuals. As a result, symptoms such as:

• Persistent pain
• Unexplained weight loss
• Changes in bowel habits

are often overlooked or attributed to less serious conditions.

A widely reported case clearly illustrates this issue. A 23-year-old patient with bowel cancer experienced symptoms for more than 18 months before receiving a diagnosis. By the time the disease was identified, it had progressed significantly, limiting treatment options. Such cases highlight how delayed recognition can directly affect outcomes in younger patients.

Beyond individual cases, the broader global picture adds to the urgency. According to estimates from the The Lancet Global Burden of Disease study, there were 18.5 million new cancer cases worldwide in 2023, and this number is projected to rise to 30.5 million by 2050, with deaths expected to increase by more than 70% over the same period. (3^✔ ✔Trusted Source
Global cancer burden: progress, projections, and challenges

Go to source)

At the same time, there is a crucial opportunity for prevention. Research indicates that around 41.7% of cancer deaths are linked to modifiable risk factors, including:

• Obesity
• Poor diet
• Physical inactivity
• Environmental exposures

This suggests that while the causes of early-onset cancer are complex and not fully understood, a significant proportion of cases could potentially be reduced through lifestyle changes and public health interventions.

The Changing Landscape of Cancer Risk

Overall, the findings from England point to a fundamental shift in how cancer develops and who it affects. While obesity has emerged as a major contributor, it does not fully account for the rising incidence.

Increasing evidence suggests that a combination of early-life exposures, environmental influences, and modern lifestyle patterns may be shaping cancer risk much earlier than previously recognized.

As Prof. Justin Stebbing has emphasized, the rise in early-onset cancers is real, concerning, and still only partly understood. The most important takeaway is that cancer can no longer be viewed solely as a disease of later life. Instead, it may begin developing over decades, influenced by factors that act long before symptoms appear—making awareness, early diagnosis, and prevention more critical than ever.

References:

1. Temporal trends in behavioural risk factors for cancers with rising incidence in younger adults: an analysis of population-based data in England – (https://bmjoncology.bmj.com/content/5/1/e000966)
2. Is early-onset cancer an emerging global epidemic? Current evidence and future implications – (https://www.nature.com/articles/s41571-022-00672-8)
3. Global cancer burden: progress, projections, and challenges – (https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(25)01570-3/fulltext)

Source-Medindia