Researchers have identified important differences in colorectal cancer tumours found in younger and older patients. The findings may help explain why colon cancer can sometimes be more difficult to treat in people diagnosed before the age of 50.
The study examined 189 colorectal cancer tumour samples from patients ranging from their 20s to their 90s. Scientists discovered differences in the cells and genetic activity within tumours, offering new clues about how the disease may behave at different ages.
Younger Patients Show Different Tumour Characteristics
Researchers found that tumours from younger patients contained higher numbers of stromal cells. These are connective-tissue cells that form part of the environment surrounding a tumour.
Stromal cells can sometimes support tumour growth and create conditions that make it harder for immune cells and certain cancer treatments to reach cancer cells.
Similar cellular patterns have previously been associated with resistance to chemotherapy in other types of cancer.
Genetic Differences May Influence Cancer Behaviour
The research also identified dozens of genes whose activity differed between younger and older patients.
Some of these genes were associated with metastasis, the process through which cancer spreads from its original location to other parts of the body.
These findings could help scientists better understand why some younger patients experience more challenging disease outcomes.
Could This Lead to Better Cancer Treatments?
Researchers hope that further investigations will identify specific biological targets that could support more personalised cancer treatments.
One possible research direction involves targeting stromal cells that help create a protective environment around tumours.
A better understanding of these cellular differences may also help scientists improve approaches to colorectal cancer screening and early detection.
More Research Is Needed
The study does not prove that these cellular differences directly cause cancer to spread faster or become resistant to treatment. Evidence comparing outcomes in younger and older patients is also mixed.
For now, younger and older patients generally receive similar treatment approaches.
The findings provide a new direction for research and may eventually help doctors develop more personalised strategies for treating colorectal cancer.
