New US research has shown that the rates of colorectal cancer in Americans under 50 are increasing.

In the United States, colorectal cancer would affect younger patients

The new study, conducted by scientists at the University of Texas at Austin, took into account information from the U.S. National Cancer Database, data that included more than 70% of new cancer cases in the country, to determine infer the trends in colorectal cancer since 1970.

More Americans under 50 affected by colorectal cancer

The results, published in the journal

CANCER (American Cancer Society), have shown that the number of American adults who have been diagnosed with

Colorectal cancer before the age of 50 had continued to increase over the past ten years, from 10% in 2004 to 12.2% in 2015.

In addition, 51.6% of people under 50 diagnosed were diagnosed at more advanced stages of their colorectal cancer compared to 40% of people over 50.

African-American and Hispanic adults under 50 also had higher rates of this cancer than non-Hispanic white subjects of the same age.

Towards earlier detection?

The rates of diagnoses of this type of cancer in young adults have also increased in all socio-professional categories, although the highest rate of diagnoses came from the more affluent categories of the population.

Numerous studies have shown that the rates of colorectal cancer in younger adults have slowly increased in the United States since the 1970s, but for doctors in the field, they feel like they are seeing more and more young people. suffer from colorectal cancer compared to 10 years agocommented study author Dr. Boone Goodgame.Until last year, the recommendations were to be screened from the age of 50. Many institutions now recommend screening at the age of 45, but few doctors and patients seem to follow these recommendations. “

Dr. Goodgame noted that the cause of the increased rates of this type of cancer in those under the age of fifty was not obvious, although new research suggests that it could be due to several added factors such as ‘increase of

body mass index and changes in the gastrointestinal microbiota.

Already identified risk factors

Previous research had already established a link between colorectal cancer and too much inactivity (people who watched a lot

television), too much alcohol consumption, industrial meats and a lack of exercise.


balanced diet, which includes in particular nuts and

Whole grains, an important

physical activity, and low alcohol consumption have been associated with lower risk.


American Cancer Society advises 45-year-old adults to get screened for colorectal cancer regularly.

Created Jul 22, 2019


Recent trends in the age at diagnosis of colorectal cancer in the US National Cancer Data Base, 2004‐2015 – John Virostko et al. – Cancer First published: 22 July 2019 (

accessible online)