--- title: "Colorectal cancer rates rising among young individuals since mid-1990s" url: https://newscentral.site/colorectal-cancer-rates-rising-among-young-individuals-since-mid-1990s/ language: en publisher: "News Central Site" section: "Science" published: 2026-10-29T10:00:00.000Z updated: 2026-10-29T10:40:05.261Z id: 86334984-5d13-4367-8456-ab9b2e9e34b9 source: "Live Science https://www.livescience.com/health/cancer/study-reveals-new-clues-to-why-colorectal-cancer-in-young-people-is-so-deadly" attribution: "Link to https://newscentral.site/colorectal-cancer-rates-rising-among-young-individuals-since-mid-1990s/ and name News Central Site when you quote or summarize this story." --- # Colorectal cancer rates rising among young individuals since mid-1990s Researchers have identified significant differences in tumor characteristics between young and old patients with colorectal cancer. Colorectal cancer rates have been steadily increasing among individuals under 50 since the mid-1990s, a trend that is both puzzling and alarming. This rise in early-onset cancers has led to concerns about their aggressive nature and resistance to treatment. Researchers have long sought answers to explain why these young patients are more susceptible to deadly outcomes compared to older adults with colorectal cancer. A new study published recently sheds light on this mystery by comparing tumor samples from people between 29 and over 90 years old. The comparison revealed significant differences in the characteristics of tumors found in young versus old patients, providing crucial insights into the underlying causes of early-onset colorectal cancer. The findings may eventually lead to the development of new treatment strategies for these aggressive cancers. Study co-author Ana Anderson, a professor of neurology at Harvard Medical School, believes that this research marks a significant turning point in understanding and addressing early-onset colorectal cancer. According to her, the study's results will help scientists tackle the pressing questions surrounding this rising disease, particularly its increasing prevalence among young people under 50. The team of researchers led by Anderson has made significant progress in understanding why colorectal cancer is so aggressive in young people. Through their analysis, they found that tumors from younger patients tend to have a higher proportion of connective tissue cells compared to malignant cancer cells. This finding suggests that the disease may be behaving differently in younger individuals, potentially making it more challenging to treat. The team's use of RNA analysis allowed them to work with frozen and banked tumor tissue, enabling them to examine subtle differences between age groups. The researchers analyzed 189 tumors in total, consisting of 54 from patients under 50 and 135 from those over 50. By comparing these samples, they were able to pinpoint gradual differences tied to each age group, rather than just comparing the two groups overall. This approach allowed them to identify distinct patterns in the tumors of younger and older patients. For instance, younger patients had a higher proportion of connective tissue cells in their tumors compared to malignant cancer cells, whereas this pattern was reversed in older patients. Research has shed light on why colorectal cancer in younger individuals is often more aggressive and resistant to treatment. A key factor may be the prevalence of connective tissue cells within tumors, which can secrete compounds that suppress the immune system. This could help protect the tumor from being targeted by immune cells, allowing it to grow unchecked. These connective tissue cells also pose a physical barrier to chemotherapy drugs, preventing them from reaching cancerous cells. As a result, younger patients' cancers may be more likely to resist treatment. The researchers suggested that this phenomenon could contribute to the poor prognosis for young people with colorectal cancer. The study's findings also suggest that younger patients' cancer cells exhibit distinct patterns of gene activity related to cell-to-cell communication. This increased ability to communicate may facilitate the migration of cancer cells through the body, potentially leading to a higher risk of metastasis. In other types of cancer, this kind of gene activity has been linked to more aggressive tumor behavior. The researchers also discovered an intriguing anomaly in the study's results: the presence of large amounts of long noncoding RNA within tumors. The significance and implications of this finding remain unclear, but it adds another layer of complexity to the mysteries surrounding colorectal cancer in young people. The discovery of long noncoding RNA in colorectal cancer cells has shed new light on the complex mechanisms behind this aggressive disease in young people. These strands of RNA contain more than 200 nucleotides that do not provide instructions for building proteins, and scientists are still unclear about their function in the body. Research suggests that they may play a crucial role in tumor development, but further investigation is needed to understand their specific involvement. Anderson's team is already working on manipulating the long noncoding RNA found inside cancer cells in laboratory settings, with the aim of gaining more insight into its role and potential as a therapeutic target. This research could ultimately provide another piece of the puzzle for understanding why colorectal cancer is so deadly in young people. The findings open up new avenues for research into this disease, which had previously been poorly understood. --- Source: [Live Science](https://www.livescience.com/health/cancer/study-reveals-new-clues-to-why-colorectal-cancer-in-young-people-is-so-deadly) Published by News Central Site: https://newscentral.site/colorectal-cancer-rates-rising-among-young-individuals-since-mid-1990s/