By: Jasa Sarker and Natalia Zajac
Cancer has long been associated with older adults, with age considered one of the greatest risk
factors for developing the disease. Yet, recent research has revealed a new concerning trend: certain types of cancer are becoming increasingly common among adults under the age of 50.
This occurrence, known as early onset cancer, has raised questions among researchers about
what may be contributing to the increase and what this means for younger generations.
According to the 2025 report from the National Cancer Institute (NCI), researchers examined
cancer trends in the United States and found that rates of fourteen different cancer types
increased in at least one age group under fifty between 2010 and 2019. Among these were
breast, uterine, and kidney cancers. Although cancer remains significantly more common
among older adults, these findings have suggested that the age patterns of certain cancers may
be changing.
Colorectal cancer has especially become a concern. Traditionally, associated with individuals in
their 60s and 70s, the disease is increasingly being diagnosed in younger adults. The NCl
reported that the average age of colorectal cancer diagnosis in the United States has declined
from roughly 72 to 67. Researchers have also observed rising rates of early onset colorectal
cancer in numerous countries, illustrating that this is not an issue limited to the United States.
What Is Causing This Increase?
Although research is growing, scientists have yet to identify an exact explanation. Several
potential contributing factors are being investigated, including obesity, alcohol consumption,
dietary patterns, and environmental exposures.
One emerging area of research involves the gut microbiome, the collection of microorganisms
living in our digestive system. Scientists are now investigating whether changes in these
bacteria may influence inflammation, DNA damage, and ultimately cancer development. Several
studies have even examined whether toxins produced by specific strains of bacteria could
contribute to colorectal cancer.
Genetics also plays an important role in determining an individual’s cancer risk. However,
researchers emphasize that inherited genetic changes alone do not explain the increasing rates
observed over just a few decades. Instead, the trend may reflect a combination of several
aspects; including, environmental, lifestyle, and biological factors that scientists are still working
to understand.
Why Should Young Adults Pay Attention?
One of the challenges surrounding early onset cancer is that younger individuals may not
immediately recognize systems as potential threats. Persistent abdominal pain, unexplained
changes in bowel habits, rectal bleeding, and iron deficiency anemia can sometimes be
associated with colorectal cancer. Although these symptoms are often caused by less serious
conditions, persistent or unexplained changes should be evaluated by a healthcare
professional.
Age can also influence how rapidly a diagnosis may be considered. Since cancer is less
common in younger adults, symptoms may initially be attributed to other conditions, potentially
delaying further testing.
For college students, these findings are not a reason to feel panic, rather a reminder that
understanding personal health matters at every age. Knowing your own family medical history,
recognizing persistent changes in the body, and seeking medical advice when necessary are
important steps towards maintaining long term health.
As researchers continue investigating the causes of early onset cancer, one message remains
consistent: while cancer is still predominantly a disease of older age, younger adults are not
entirely exempt. Greater awareness, continued scientific research, and timely medical
evaluation may help address this growing public health concern.
