Investigating the rise of early-onset cancer | Four Corners Documentary

Key Concepts

• Early-onset cancers: Increase in cancer rates among younger adults (30s and 40s).
• Exposome: The totality of environmental (including lifestyle) exposures from conception onwards.
• DNA damage patterns: Specific types of DNA mutations observed in early-onset colorectal cancer.
• "Safety netting": A structured approach for GPs to manage uncertainty in diagnosing cancer, involving clear follow-up plans.
• Precautionary principle: Taking action to prevent potential harm even with incomplete scientific evidence.
• Financial toxicity: The financial burden and distress experienced by cancer patients and their families.
• Microbiome: The community of microorganisms (bacteria, fungi, viruses) living in the human gut.
• Ultra-processed foods: Industrial food formulations, often high in sugar, fat, and additives.
• PFAS (Per- and Polyfluoroalkyl Substances): A group of persistent chemicals used in various products, including non-stick cookware and food packaging.
• POA (Perfluorooctanoic acid): A type of PFAS linked to kidney and breast cancer.

Rising Rates of Early-Onset Cancers

• Young Australians (30s and 40s) are experiencing unprecedented rates of cancer.
• Australia leads the world in early-onset bowel cancer rates.
• Since 2000, rates in 30-39 year olds have increased significantly:
  • Bowel cancer: +173%
  • Prostate cancer: +500%
  • Kidney cancer: +85%
  • Liver cancer: +150%
  • Pancreatic cancer: +200%
  • Breast cancer: +4%
• Data from the United States confirms these increases.
• Cancer Australia commissioned work confirming the increase in cancers in younger people.

Generational Change in Bowel Cancer

• Associate Professor Dan Buchanan's research shows a generational change in DNA mutations in bowel tumors.
• Younger patients have a higher proportion of a specific type of DNA damage pattern.
• This suggests factors or exposures are contributing to earlier diagnoses.
• Colorectal cancer is described as the "canary in the coal mine," indicating a broader trend.

Personal Stories

• Chris: Diagnosed with advanced bowel cancer at 41. Experienced bleeding, initially dismissed. Underwent surgery and chemotherapy.
• Fiona: Diagnosed with liver cancer (hepatocellular carcinoma) in her early 40s. Experienced itching and abdominal pain, initially misdiagnosed. Underwent surgery and immunotherapy.
• Patrice: Diagnosed with stage three breast cancer. Found multiple tumors. Underwent mastectomy, ovary removal, and hormone treatment.

The Exposome and Potential Causes

• Associate Professor Jeanluca Sey is investigating the human exposome to understand cancer causes.
• The exposome includes environmental factors, lifestyle, and their interactions.
• Tumor development can take decades, so exposures from childhood or even earlier are relevant.
• Potential factors include:
  • Childhood obesity: Increasing obesity in young adults may contribute to early-onset cancers.
  • Changes in the microbiome: Increased cesarean births, antibiotic use, and ultra-processed foods may alter gut bacteria balance.
  • Exposure to toxins from bowel bugs: E. coli toxin may drive some DNA mutations.
  • Chemicals and plastics: Exposure to synthetic chemicals in plastics is a concern.

Plastics and Chemical Exposure

• Dr. Christo Simeon studies chemical and microplastic exposures.
• Approximately 16,000 chemicals are used in plastics, but only one-third have been evaluated for potential hazards.
• Of those evaluated, around 75% are identified as hazardous.
• The current system assumes chemicals are safe until proven harmful.
• PFAS, including POA, are persistent chemicals found in various products.
• POA is linked to kidney and breast cancer.
• A ban on industrial use of POA in Australia has recently come into force.

The Origins Study

• A large study in Perth is tracking children's environmental exposures from birth.
• The Origins study follows 10,000 families to understand how early-life exposures affect health.
• The study collects biological samples and data to analyze the impact of environmental factors on cancer pathways.

Future Projections and Policy

• Dr. Philip Rosenberg predicts that cancer incidence rates in Gen X and millennials will continue to rise.
• He expects the relative incidence to be double for the 1970 cohort compared to the 1950 cohort.
• Current national cancer plans do not specifically address early-onset cancers.
• The next national cancer plan is not due until 2033.

Challenges Faced by Younger Cancer Patients

• Younger patients face unique challenges related to career, money, and family.
• Fertility concerns and sperm banking are stressful during diagnosis and treatment.
• Financial toxicity is a significant issue, with out-of-pocket costs escalating quickly.
• Maintaining employment and managing household expenses during treatment is difficult.
• The Clinical Oncology Society of Australia has financial toxicity guidelines.

Potential Solutions

• Early detection:
  • Expanding screening programs: Lowering the age of screening is suggested but not simple due to cost-effectiveness and detection rates.
  • Improving awareness of symptoms: Educating the public and GPs about red flags and the need for investigation.
  • "Safety netting": Implementing structured follow-up plans in general practice.
• Prevention:
  • Regulating chemicals: Assessing the safety of chemicals before use and ensuring transparency about chemical exposure.
  • Applying the precautionary principle: Taking action to mitigate potential harm even with incomplete evidence.

Conclusion

The video highlights the alarming rise in early-onset cancers, particularly in Australia, and explores potential causes related to environmental exposures, lifestyle factors, and changes in the microbiome. It emphasizes the need for further research, improved early detection strategies, and proactive measures to prevent exposure to harmful chemicals. The personal stories underscore the challenges faced by younger cancer patients and the importance of community support. The call to action urges governments and regulators to prioritize prevention and protect future generations.