A major analysis by the World Cancer Research Fund examining cancer data from England, the United States, and the Netherlands has identified significant increases in early-onset cancer cases across multiple tumor types. The study identified rising incidence rates in seven cancer types in England, five in the US, and four in the Netherlands among patients under 50 years old.
In England specifically, prostate cancer diagnoses in men under 50 increased substantially, rising from one per 100,000 people in 2001 to 3.6 per 100,000 in 2023. Bowel cancer diagnoses in the under-50 population more than doubled from 3.9 per 100,000 in 2001 to 8.4 per 100,000 in 2023. Early-onset uterine and kidney cancers also saw notable increases, doubling to 3.9 and 3 per 100,000 people respectively. Breast cancer among younger patients increased from 42 to 47.5 per 100,000, while pancreatic and liver cancers also showed rising incidence. In the US, kidney cancer more than doubled from 2.5 per 100,000 in 2000 to 5.3 in 2023, with bowel, uterine, and pancreatic cancers increasing by more than 50 percent and breast cancer by approximately 20 percent.
Researchers attributed the increases to several interconnected factors. Lifestyle elements including growing obesity rates, poor dietary patterns, insufficient physical activity, alcohol consumption, and smoking are considered significant contributors, with approximately 40 percent of cancers linked to modifiable risk factors. Environmental exposures such as pollutants and chemical contamination may also play a role. Simultaneously, increased public awareness of cancer symptoms and risk factors has led to earlier detection and diagnosis in many cases, making it difficult to determine the extent to which actual disease incidence has risen versus improved detection rates.
One notable exception to the upward trend involves lung cancer among younger adults, which declined across all three countries, consistent with continued decreases in smoking rates. Experts emphasized that while cancer remains significantly more common in older populations, the changing patterns among younger generations warrant serious research and prevention efforts. King’s College London announced a new trial involving 250,000 participants, funded by Cancer Research UK, specifically designed to investigate the increase in bowel cancer among younger adults and to clarify the relative contributions of worsening risk factors versus improved detection.
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