U.S. Task Force: Colorectal Cancer Screenings for ‘Average Risk’ Adults Should Start at Age 45

Adults at “average risk” who do not have symptoms should be screened for colorectal cancer starting at age 45, five years earlier than is now recommended, the nation’s top preventive medicine panel now says.

The U.S. Preventive Services Task Force currently recommendsthat people aged 50 to 75 be regularly screened for colorectal cancer. Untilit’s newlyannounced guidance, the position of the task forcestood in contrast with the American Cancer Society’s, which updated itsrecommendation in 2018 to say regular screenings should start at age 45.

Colorectal cancer, which includes bowel cancer, colon cancer, orrectal cancer, refers to any cancer that affects the colon and the rectum. The draftrecommendation from the task force is now openfor public comment.

“Colorectal cancer is the third leading cause of cancer deaths,so making an impact on that third leading cause, where we think there are quitea few preventable deaths, can make a big difference,” said Michael Barry, amember of the U.S. Preventive Services Task Force and a professor of medicineat Harvard Medical School.

Rates of colorectal cancer in people younger than 50 have beenincreasing by about 2 percent a year. Consult with your primary care physicianto determine if you are at average risk for colorectal cancer and when youshould be screened.

The updated guidance by the U.S. task force does not apply toadults with a family history of colorectal cancer, a history of inflammatory boweldisease, genetic syndromes such as familial cancerous polyps, a personalhistory of previous colorectal cancer or benign polyps, or other risk factors. Thesehigher-risk adults should be screened by age 40 or earlier.

“Early screening is indicated if there is a first-degree relative with history of colorectal cancer and in patients with known high-risk genetic syndromes such as hereditary nonpolyposis colorectal cancer,” says Michael Chuong, M.D., a radiation oncologist and director of Proton and MR-Guided Radiation Therapy at Miami Cancer Institute, who specializes in the treatment of gastrointestinal cancers. “Early screening should begin at 40 years, or 10 years before the first-degree relative’s diagnosis, whichever is earlier.”

The colonoscopy is still the No. 1 recommended procedure. Thereis also a “virtual colonoscopy” option for those who don’t want to go throughan invasive test. Moreover, there are basic at-home screening kits availablefor colorectal cancers — the fecal occult blood test (FOBT); the fecalimmunochemical test (FIT), and the stool DNA test. If these tests come backpositive, a colonoscopy is generally recommended.

But only during colonoscopies can precancerous orsuspicious-looking polyps be removed.

“We should educate the public about the high prevalence ofcolorectal cancer, and that screening leads to detecting colorectal cancer atan earlier stage that is more likely curable,” says Dr. Chuong. “Nationalcolorectal cancer screening recommendations are in place because screeningsaves lives.”