Rectal Bleeding in Young Adults Associated to 8.5 Times Higher Risk of Colorectal Cancer

Medical professional consulting with young patient
New research shows that rectal bleeding may be a red flag for colorectal cancer in younger adults. Getty Images
  • Researchers report that rectal bleeding is a significant indication of young-onset colorectal cancer in adults under 50.
  • Experts advise that individuals under 50 who experience this sign should have a colonoscopy to screen for colorectal cancer.
  • Incidence of young-onset colorectal cancer in young adults have been increasing for more than a decade.

Rectal bleeding is a clear indicator that young adults may have colorectal cancer, based on a new study.

Researchers found that rectal bleeding in individuals under 50 raises the likelihood of a colorectal cancer diagnosis by a factor of 8.5.

The researchers reached their conclusions after analyzing 443 individuals under 50 who had a colonoscopy at a university health system between 2021 and 2023.

Among the participants, 195 were found with early-onset colorectal cancer while 248 individuals had clear colonoscopy results.

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

They added that a significant percentage of the cancer patients had no family history of the disease.

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

The researchers’ research was presented this week at a professional gathering. The results have yet to be released in a scientific publication.

Rectal Bleeding May Indicate Bowel Cancer

The scientists said that their study shows that individuals under 50 as well as healthcare providers should consider rectal bleeding as a significant sign of colorectal cancer.

“A large number of the early-onset colorectal cancers that I encounter have no genetic predisposition,” said a colorectal surgeon and senior author of the research. “This research adds weight to the question of who should or shouldn’t require a colonoscopy: if you have a individual below the recommended age with rectal bleeding, you should seriously consider a colonoscopy.”

Experts interviewed who were not involved in the study concurred with this conclusion.

“Younger individuals with rectal bleeding should get a colonoscopy,” advised a professor of medical oncology. “The hardest point to get across is that colorectal cancer is a condition of young people.”

Another surgical oncologist said that doctors should no longer presume that rectal bleeding in younger adults is caused by piles.

“Colorectal cancer is a younger individual’s condition,” he commented. “We can not take for granted signs such as rectal bleeding in young adults.”

A senior vice president of cancer screening science at a major cancer organization concurs.

“Physicians often downplay signs of colorectal cancer in individuals under 50, thinking that the probability of the signs being caused by colorectal cancer are unlikely because the patient is too young,” the expert said. “The research findings are not surprising. Ongoing rectal bleeding is abnormal and the source should be immediately investigated.”

A cancer specialist said that the study is an significant reminder to people below the age of 50.

“Pay attention to any signs,” he said. “This study delivers this message a bit more strongly.”

Bowel Cancer Instances Rising in Younger Individuals

A major cancer organization projects there will be over one hundred fifty thousand diagnoses of colorectal cancer diagnosed in the United States this year.

More than 100,000 of those instances will be large intestine cancer, while slightly less than fifty thousand will be rectum cancer.

The cases are split roughly equally between males and females.

Colorectal cancer is the third-leading cause of cancer-related deaths in males and the fourth most common leading cause in women in the United States. It’s the second prevalent cause of cancer deaths in total. Colorectal cancer is expected to cause about 53,000 deaths this year.

The cancer organization reports that the incidence of people being diagnosed with colorectal cancer in the United States has been decreasing about 1% per year since the mid-1980s. They credit timely testing and changes in daily routines.

However, they note that the decrease is mostly occurring in individuals over 50. In people under 50, the incidence of colorectal cancer detection rose over 2% per year between 2012 and 2021.

The mortality rate from colorectal cancer has also been decreasing slightly in the general public, but it has been rising slightly in individuals under 50.

Actually, colon cancer is the primary reason of cancer-related death in adults between 20 to 49 in the United States.

An specialist noted that people born around 1990 have twice the risk of colorectal cancer relative to people born approximately 1950.

“These dangers are increasing and are carried forward as people age, meaning we observe an increasing number of cases of colorectal cancer both below and above age 45,” he explained.

Medical professionals aren’t certain what is driving the increase in young-onset colorectal cancer, but diet, lack of physical activity, and excess weight are among the possible factors.

Another specialist mentioned there are also some theories that the overuse of medications as well as inflammation in the body may be helping drive up colorectal cancer incidence.

In addition, there has also been some research suggesting that gut microbes may additionally be involved.

One expert said that exposure to this kind of microbes as a child may cause colorectal cancer to appear 20 to 30 years down the road.

“We’re continuing to trying to figure everything out,” he said.

The Importance of Colorectal Cancer Tests Are Important

Healthcare professionals state that colorectal cancer is curable if detected in its initial phases. In later stages, it can be deadly.

They emphasize that’s why screenings are crucial.

Present recommendations call for males and females to begin being tested for colorectal cancer at age forty-five.

In addition, screenings may be necessary prior to age 45 if a individual has a family history of colorectal cancer or has specific medical conditions such as inflammatory bowel disease (IBD).

It’s advised that colonoscopy screenings be done once a decade for people with no family history of the condition and no polyps found during the procedure. The interval between tests can be more frequent for different patients.

Colon examinations are typically regarded as the best screening for colorectal cancer, but alternative methods, such as home test kits, can also be used.

Besides rectal bleeding, other signs of colorectal cancer consist of:

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

An specialist adds that family history should never be overlooked.

“Individuals should know their genetic background of cancer and any diagnosis of colorectal cancer among relatives should be discussed with their doctor, especially if family members were diagnosed at a young age,” he advised.

How to Reduce Your Chances of Bowel Cancer

There are a variety of ways a person can lower their risk of colorectal cancer. Among them:

  • Balanced nutrition: Eating patterns rich in unhealthy fats and low in dietary fiber are linked with an higher chance of colorectal cancer. Beef and processed foods have been demonstrated to increase the danger. Protein from poultry, fish, and legumes is regarded as a healthier option. Fiber-rich items, such as fruits, vegetables, and grains, may decrease the probability of colorectal cancer.
  • Physical activity: A leading cancer research institute suggests 2.5 hours of moderate exercise a week. {Regular|Consistent
Alexis Anthony
Alexis Anthony

A passionate writer and performance coach dedicated to helping others unlock their full potential through actionable advice.