Bleeding from the Rectum in Young Adults Associated to 8.5 Times Higher Risk of Colorectal Cancer

Medical provider consulting with youthful patient
Recent research indicates that rectal bleeding can be a warning sign for colorectal cancer in individuals under 50. Getty Images
  • Researchers report that rectal bleeding is a strong sign of young-onset colorectal cancer in adults under 50.
  • Specialists say that younger adults who experience this symptom should have a colonoscopy to screen for colorectal cancer.
  • Incidence of young-onset colorectal cancer in young adults have been rising for more than a decade.

Rectal bleeding is a telltale sign that individuals under 50 may have colorectal cancer, based on a recent research.

Researchers reported that rectal bleeding in younger adults raises the odds of a colorectal cancer diagnosis by 8.5 times.

The researchers arrived at their findings after examining 443 patients under 50 who had a colonoscopy at a medical center between 2021 and 2023.

Of the participants, nearly 200 were found with early-onset colorectal cancer while the remaining subjects had normal colonoscopy findings.

The researchers noted that 88% of the young cancer patients had a colonoscopy because of signs, not because of regular check-ups.

They added that 70% of the cancer patients had no genetic background of the disease.

In addition, people who had used tobacco in the past were more than two times as prone to develop early onset colorectal cancer as people who hadn’t smoked.

The researchers’ study was presented this week at a professional gathering. The findings have yet to be released in a peer-reviewed journal.

Bleeding from the Rectum Could Signal Colorectal Cancer

The researchers stated that their research shows that young adults as well as medical professionals should consider rectal bleeding as a important sign of colorectal cancer.

“A large number of the young-onset colorectal cancers that I encounter have no family history,” commented a specialist and senior author of the study. “This study adds weight to the question of who does or doesn’t warrant a colonoscopy: if you have a person under the screening age with rectal bleeding, you should strongly think about a colonoscopy.”

Experts interviewed who were not involved in the research concurred with this assessment.

“Younger individuals with rectal bleeding should undergo a colonoscopy,” said a professor of medical oncology. “The hardest message to communicate is that colorectal cancer is a condition of young people.”

Another cancer surgeon said that medical professionals should no longer assume that rectal bleeding in younger adults is caused by hemorrhoids.

“Colorectal cancer is a young person’s condition,” he commented. “We can no longer dismiss signs such as rectal bleeding in young adults.”

A leading expert of early cancer detection science at a major cancer organization concurs.

“Physicians often downplay signs of colorectal cancer in younger adults, thinking that the probability of the symptoms being caused by colorectal cancer are unlikely because the patient is under 50,” the specialist noted. “The research findings are expected. Ongoing rectal bleeding is not normal and the cause should be promptly investigated.”

A cancer specialist commented that the research is an significant warning to people under the age of 50.

“Pay attention to any signs,” he said. “This study delivers this message a little louder.”

Colorectal Cancer Instances Rising in Young Adults

A major cancer organization estimates there will be more than 150,000 diagnoses of colorectal cancer identified in the United States this year.

Over one hundred thousand of those cases will be colon cancer, while just under fifty thousand will be rectum cancer.

The diagnoses are split almost evenly between males and women.

Colorectal cancer is the third-leading cause of cancer-related deaths in men and the fourth leading cause in women in the United States. It’s the second prevalent cause of cancer deaths overall. Colorectal cancer is projected to cause about 53,000 deaths this year.

The cancer organization states that the incidence of people being found with colorectal cancer in the United States has been declining approximately one percent per year since the mid-1980s. They attribute early screening and changes in lifestyle habits.

However, they point out that the decrease is primarily occurring in older adults. In people below 50, the rate of colorectal cancer diagnosis rose more than two percent per year between 2012 and 2021.

The mortality rate from colorectal cancer has also been declining moderately in the overall population, but it has been rising slightly in younger adults.

In fact, colon cancer is the primary reason of cancer death in adults between 20 to 49 in the United States.

An specialist said that people born around 1990 have double the likelihood of colorectal cancer relative to people born approximately 1950.

“These dangers are increasing and are carried forward as people get older, meaning we observe an increasing number of diagnoses of colorectal cancer before and after age 45,” he said.

Doctors are unsure what is driving the rise in early onset colorectal cancer, but nutrition, sedentary lifestyle, and obesity are among the suspected factors.

Another specialist mentioned there are additionally some theories that the excessive use of antibiotics as well as inflammation in the body may be contributing to increase colorectal cancer rates.

Furthermore, there has also been some research suggesting that intestinal bacteria may additionally be involved.

One specialist suggested that contact to this kind of bacteria as a child may cause colorectal cancer to appear 20 to 30 years later.

“We’re continuing to working to understand everything out,” he commented.

The Importance of Bowel Cancer Screenings Matter

Medical experts say that colorectal cancer is curable if caught in its initial phases. In later stages, it can be fatal.

They say that’s why screenings are vital.

Present guidelines call for men and women to start being screened for colorectal cancer at age 45.

In addition, screenings may be required prior to age 45 if a individual has a genetic background of colorectal cancer or has certain health issues such as inflammatory bowel disease (IBD).

It’s recommended that colonoscopy examinations be done every 10 years for people with no family history of the disease and no polyps found during the exam. The interval between tests can be more frequent for other patients.

Colonoscopies are generally considered the best screening for colorectal cancer, but alternative methods, such as at-home stool kits, can also be used.

Besides rectal bleeding, additional symptoms of colorectal cancer consist of:

  • alteration of bowel habits
  • diarrhea
  • constipation
  • cramping or stomach pain
  • unexplained weight loss

An expert adds that family history should not be overlooked.

“Individuals should know their genetic background of cancer and any identification of colorectal cancer among relatives should be discussed with their physician, particularly if relatives were diagnosed at a early age,” he advised.

How to Lower Your Risk of Bowel Cancer

There are a number of ways a individual can lower their risk of colorectal cancer. These include:

  • Healthy diet: Eating patterns rich in unhealthy fats and low in dietary fiber are linked with an higher chance of colorectal cancer. Red and processed meats have been demonstrated to increase the risk. Protein from poultry, fish, and legumes is considered a better option. High-fiber foods, such as fruits, vegetables, and grains, may decrease the probability of colorectal cancer.
  • Regular exercise: A major cancer research institute suggests 2.5 hours of moderate physical activity a week. {Regular|Consistent
Christopher Barker
Christopher Barker

A seasoned business strategist with over a decade of experience in leadership development and corporate transformation.