Bleeding from the Rectum in Young Adults Linked to Substantially Elevated Risk of Colorectal Cancer

Medical provider speaking with youthful patient
Recent research indicates that rectal bleeding may be a warning sign for colorectal cancer in individuals under 50. Getty Images
  • Researchers report that rectal bleeding is a strong indication of early onset colorectal cancer in adults below 50.
  • Specialists say that individuals under 50 who experience this symptom should have a colon examination to screen for colorectal cancer.
  • Rates of young-onset colorectal cancer in younger individuals have been increasing for over a decade.

Bleeding from the rectum is a clear indicator that young adults could have colorectal cancer, based on a new study.

Researchers reported that rectal bleeding in individuals under 50 raises the likelihood of a colorectal cancer identification by 8.5 times.

The researchers reached their findings after examining 443 patients under 50 who underwent 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 normal colonoscopy results.

The scientists noted that the vast majority of the younger individuals with cancer underwent a colonoscopy because of symptoms, not because of regular check-ups.

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 young-onset colorectal cancer as people who were non-smokers.

The researchers’ study was presented this week at a major medical conference. The findings have not been published in a peer-reviewed journal.

Rectal Bleeding Could Signal Bowel Cancer

The scientists stated that their research demonstrates that young adults as well as healthcare providers should take rectal bleeding as a important sign of colorectal cancer.

“A large number of the early-onset colorectal cancers that I encounter have no genetic predisposition,” commented a colorectal surgeon and lead researcher of the research. “This study lends support to the question of who should or shouldn’t require a colonoscopy: if you have a person under the screening age with rectal bleeding, you should strongly think about a colonoscopy.”

Specialists interviewed who were independent in the research concurred with this conclusion.

“Younger individuals with rectal bleeding should undergo a colonoscopy,” said a cancer specialist. “The most difficult message to communicate is that colorectal cancer is a condition of younger individuals.”

Another cancer surgeon stated that medical professionals should no longer presume that rectal bleeding in individuals under 50 is caused by piles.

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

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

“Doctors often minimize symptoms of colorectal cancer in individuals under 50, believing that the chances of the signs being caused by colorectal cancer are remote because the patient is too young,” the specialist said. “The research findings are expected. Ongoing rectal bleeding is not normal and the cause should be promptly examined.”

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

“Don’t ignore any signs,” he said. “This study sends this warning a little louder.”

Colorectal Cancer Instances Increasing in Younger Individuals

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

More than one hundred thousand of those instances will be colon cancer, while slightly less than 50,000 will be rectum cancer.

The cases are split roughly equally between males and women.

Colorectal cancer is the third most common cause of cancer deaths in males and the fourth most common primary reason in females in the United States. It’s the second prevalent cause of cancer deaths in total. Colorectal cancer is projected to cause approximately 53,000 deaths this year.

The institute reports that the incidence of people being diagnosed with colorectal cancer in the United States has been declining about 1% per year since the mid-1980s. They credit early screening and changes in lifestyle habits.

Nevertheless, they point out that the downward trend is mostly occurring in individuals over 50. In people below 50, the rate of colorectal cancer diagnosis rose over two percent per year between 2012 and 2021.

The mortality rate from colorectal cancer has additionally been decreasing slightly in the general public, but it has been rising somewhat 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 expert said that people born around 1990 have double the likelihood of colorectal cancer compared with people born around 1950.

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

Doctors aren’t certain what is causing the rise in young-onset colorectal cancer, but nutrition, lack of physical activity, and excess weight are among the suspected 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 rates.

Furthermore, there has also been some study indicating that intestinal bacteria may also be involved.

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

“We’re still trying to figure all this out,” he said.

Why Colorectal Cancer Tests Matter

Healthcare professionals state that colorectal cancer is curable if caught in its early stages. In advanced phases, it can be fatal.

They emphasize that’s why examinations are crucial.

Present recommendations call for males and females to start being tested for colorectal cancer at age 45.

In addition, tests may be necessary before age 45 if a individual has a genetic background of colorectal cancer or has specific health issues such as inflammatory bowel disease (IBD).

It’s advised that colonoscopy examinations be done once a decade for people with no genetic risk of the disease and no polyps found during the exam. The interval between tests can be more frequent for other patients.

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

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

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

An expert notes that genetic background should not be ignored.

“Individuals should be aware of their genetic background of cancer and any identification of colorectal cancer among relatives should be talked about with their doctor, especially if family members were found at a young age,” he advised.

Ways to Reduce Your Chances of Bowel Cancer

There are a variety of ways a person can reduce their likelihood of colorectal cancer. These include:

  • Balanced nutrition: Diets high in fat and low in dietary fiber are linked with an higher chance of colorectal cancer. Red and processed meats have been shown to increase the danger. Nutrition from chicken, seafood, and legumes is considered a better option. Fiber-rich items, including fruits, vegetables, and grains, may decrease the probability of colorectal cancer.
  • Regular exercise: A major health organization recommends 2.5 hours of moderate-intensity exercise a week. {Regular|Consistent
Jasmine Johnson
Jasmine Johnson

A passionate writer and innovation coach, Lena shares insights to help others unlock their creative potential.