Rectal Bleeding in Younger Individuals Associated to Substantially Elevated Risk of Colorectal Cancer

Healthcare professional consulting with young patient
Recent research shows that rectal bleeding can be a warning sign for colorectal cancer in individuals under 50. Getty Images
  • Researchers report that rectal bleeding is a significant sign of early onset colorectal cancer in adults below 50.
  • Specialists advise that individuals under 50 who experience this sign should undergo a colon examination to check for colorectal cancer.
  • Rates of early onset colorectal cancer in young adults have been increasing for over a decade.

Bleeding from the rectum is a clear indicator that individuals under 50 could have colorectal cancer, based on a new study.

Scientists found that rectal bleeding in younger adults increases the likelihood of a colorectal cancer identification by 8.5 times.

The researchers reached their conclusions after analyzing 443 individuals below 50 who had a colonoscopy at a medical center between 2021 and 2023.

Of the participants, 195 were diagnosed with early-onset colorectal cancer while 248 subjects had clear colonoscopy results.

The researchers noted that 88% of the young cancer patients underwent a colonoscopy because of signs, not because of routine screenings.

They further stated that a significant percentage of the cancer patients had no family history of the condition.

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 scientific study was shared this week at a professional gathering. The findings have yet to be released in a scientific publication.

Bleeding from the Rectum May Indicate Colorectal Cancer

The researchers said that their study shows that young adults as well as healthcare providers should take rectal bleeding as a important indicator of colorectal cancer.

“Many of the young-onset colorectal cancers that I see have no genetic predisposition,” said a colorectal surgeon and lead researcher of the research. “This research lends support to the question of who does or doesn’t warrant a colonoscopy: if you have a person under the recommended age with rectal bleeding, you should strongly think about a colonoscopy.”

Specialists consulted who were not involved in the study concurred with this conclusion.

“Young people with rectal bleeding should get a colonoscopy,” advised a cancer specialist. “The most difficult point to communicate is that colorectal cancer is a condition of younger individuals.”

Another surgical oncologist said that medical professionals should no longer presume that rectal bleeding in younger adults is caused by hemorrhoids.

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

A senior vice president of early cancer detection research at a major cancer organization agrees.

“Physicians often minimize symptoms of colorectal cancer in younger adults, believing that the probability of the signs being caused by colorectal cancer are unlikely because the patient is too young,” the specialist said. “The research findings are not surprising. Ongoing rectal bleeding is not normal and the source should be promptly examined.”

A medical oncologist commented that the study is an significant warning to people under the age of 50.

“Pay attention to any symptoms,” he advised. “This study sends this message a bit more strongly.”

Bowel Cancer Instances Increasing in Younger Individuals

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

Over one hundred thousand of those cases will be large intestine cancer, while slightly less than fifty thousand will be rectum cancer.

The cases are split almost evenly between men and females.

Colorectal cancer is the third most common cause of cancer deaths in males and the fourth most common leading cause in females in the United States. It’s the second most common cause of cancer fatalities overall. Colorectal cancer is projected to cause about 53,000 deaths this year.

The cancer organization states that the rate of people being diagnosed with colorectal cancer in the United States has been decreasing about one percent per year since the mid-1980s. They attribute timely testing and improvements in lifestyle habits.

Nevertheless, they note that the decrease is mostly occurring in individuals over 50. In people under 50, the rate of colorectal cancer diagnosis increased more than 2% per year between 2012 and 2021.

The mortality rate from colorectal cancer has also been decreasing slightly in the overall population, but it has been increasing somewhat in individuals under 50.

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

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

“These dangers are increasing and are persisting as people age, meaning we see more diagnoses of colorectal cancer before and after age 45,” he said.

Medical professionals aren’t certain what is causing the rise in early onset colorectal cancer, but diet, lack of physical activity, and obesity are among the possible factors.

Another expert mentioned there are also some theories that the excessive use of antibiotics as well as inflammation in the body may be contributing to drive up colorectal cancer rates.

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

One specialist suggested that contact to this kind of bacteria as a child may cause colorectal cancer to develop twenty to thirty years down the road.

“We’re still working to understand all this out,” he commented.

Why Bowel Cancer Screenings Are Important

Healthcare professionals say that colorectal cancer is treatable if caught in its initial phases. In advanced phases, it can be fatal.

They emphasize that’s why screenings are vital.

Present recommendations suggest males and females to start being screened for colorectal cancer at age 45.

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

It’s advised that colonoscopy screenings be done every 10 years for people with no genetic risk of the condition and no growths discovered during the procedure. The interval between tests can be shorter for different patients.

Colonoscopies are generally regarded as the most effective screening for colorectal cancer, but other tests, such as at-home stool kits, can also be used.

In addition to rectal bleeding, additional symptoms of colorectal cancer consist of:

  • change in bowel habits
  • diarrhea
  • constipation
  • cramping or stomach pain
  • unexpected weight loss

An specialist adds that family history should never be overlooked.

“People should be aware of their family history of cancer and any diagnosis of colorectal cancer among family members should be talked about with their physician, especially if relatives were diagnosed at a early age,” he said.

Ways 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: Diets high in fat and low in dietary fiber are associated with an increased chance of colorectal cancer. Beef and processed foods have been demonstrated to increase the risk. Protein from poultry, fish, and beans is considered a better choice. High-fiber foods, such as produce, vegetables, and cereals, may lower the risk of colorectal cancer.
  • Regular exercise: A major cancer research institute recommends 2.5 hours of moderate-intensity physical activity a week. {Regular|Consistent
Sara Rojas
Sara Rojas

Elara is a tech enthusiast and writer with a passion for exploring emerging technologies and their impact on society.