Featured Research

from universities, journals, and other organizations

Colorectal Cancer Increasing In Young Adults

Date:
June 8, 2009
Source:
American Cancer Society
Summary:
A new study finds that in sharp contrast to the overall declining rates of colorectal cancer in the United States, incidence rates among adults younger than age 50 years are increasing. The authors theorize that these increases may be related to rising rates of obesity and changes in dietary patterns, including increased consumption of fast food.

A new study finds that in sharp contrast to the overall declining rates of colorectal cancer in the United States, incidence rates among adults younger than age 50 years are increasing. The authors theorize that these increases may be related to rising rates of obesity and changes in dietary patterns, including increased consumption of fast food. The study, which appears in the June 2009 issue of Cancer Epidemiology Biomarkers and Prevention, says further studies are necessary to elucidate causes for this trend and to identify potential prevention and early detection strategies.

Overall incidence rates for colorectal cancer in the United States have been on the decline since the mid-1980s, with the drop accelerating in the most recent time period. Rates are now dropping 2.8 percent per year in men and 2.2 percent per year in women, largely due to an increase in screening, particularly colonoscopy, among individuals ages 50 years and older. Screening can reduce colorectal cancer incidence by detecting and removing polyps before they become cancerous. But recent incidence trends among adults younger than 50 years, for whom routine screening is not recommended, have not been analyzed thoroughly. A previous study did find an increase in incidence from 1973 to 1999 for all races combined, but that study did not include 40 to 49 year-olds, who represent 73 percent of colorectal cancer patients under age 50.

In a new analysis, American Cancer Society researchers led by Rebecca L. Siegel, M.P.H., looked at trends in colorectal cancer incidence rates between 1992 and 2005 among young adults (ages 20 to 49) by sex, race/ethnicity, age, stage at diagnosis, and anatomic subsite. The study found that among individuals ages 20 to 49, incidence rates of colorectal cancer increased 1.5 percent per year in men and 1.6 percent per year in women from 1992 to 2005. Among non-Hispanic Whites, rates increased for both men and women in each 10-year age grouping (20-29, 30-39, and 40-49 years) and for every stage of diagnosis. They found the largest annual percent increase in colorectal cancer incidence was in the youngest age group (20-29 years), in whom incidence rates rose by 5.2% per year in men and 5.6% per year in women. They say the rises are due to an increase in left-sided tumors, particularly in the rectum.

The researchers address several possibilities for the rise, including rising rates of obesity, which is a major risk factor for colorectal cancer. Dietary factors may also come into play. The researchers note that between the late 1970s and the mid-1990s, fast-food consumption in the United States increased 5-fold among children and 3-fold among adults. A diet high in fast food is associated with both greater meat consumption and reduced milk consumption. Increased consumption of red and processed meat has been shown to increase risk of cancers of the distal colon and rectum, while milk and calcium consumption have shown a protective effect against the subsites in which the rise in incidence was most prominent. They say it is plausible that the emergence of unfavorable dietary patterns in children and young adults over the past three decades may have contributed to the increase in CRC among young adults observed in the study.

The authors conclude: "The disparate increase in left-sided CRC suggests that particular attention be given to studies to elucidate the behavioral and environmental risk factors responsible for this trend and potential prevention and early detection strategies."


Story Source:

The above story is based on materials provided by American Cancer Society. Note: Materials may be edited for content and length.


Journal Reference:

  1. Siegel et al. Increase in Incidence of Colorectal Cancer Among Young Men and Women in the United States. Cancer Epidemiology Biomarkers & Prevention, 2009; 18 (6): 1695 DOI: 10.1158/1055-9965.EPI-09-0186

Cite This Page:

American Cancer Society. "Colorectal Cancer Increasing In Young Adults." ScienceDaily. ScienceDaily, 8 June 2009. <www.sciencedaily.com/releases/2009/06/090608072018.htm>.
American Cancer Society. (2009, June 8). Colorectal Cancer Increasing In Young Adults. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2009/06/090608072018.htm
American Cancer Society. "Colorectal Cancer Increasing In Young Adults." ScienceDaily. www.sciencedaily.com/releases/2009/06/090608072018.htm (accessed July 22, 2014).

Share This




More Health & Medicine News

Tuesday, July 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Newsy (July 22, 2014) The new sci-fi thriller "Lucy" is making people question whether we really use all our brainpower. But, as scientists have insisted for years, we do. Video provided by Newsy
Powered by NewsLook.com
Scientists Find New Way To Make Human Platelets

Scientists Find New Way To Make Human Platelets

Newsy (July 22, 2014) Boston scientists have discovered a new way to create fully functioning human platelets using a bioreactor and human stem cells. Video provided by Newsy
Powered by NewsLook.com
Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

TheStreet (July 21, 2014) New research shows Gilead Science's drug Sovaldi helps in curing hepatitis C in those who suffer from HIV. In a medical study, the combination of Gilead's Hep C drug with anti-viral drug Ribavirin cured 76% of HIV-positive patients suffering from the most common hepatitis C strain. Hepatitis C and related complications have been a top cause of death in HIV-positive patients. Typical medication used to treat the disease, including interferon proteins, tended to react badly with HIV drugs. However, Sovaldi's %1,000-a-pill price tag could limit the number of patients able to access the treatment. TheStreet's Keris Lahiff reports from New York. Video provided by TheStreet
Powered by NewsLook.com
$23.6 Billion Awarded To Widow In Smoking Lawsuit

$23.6 Billion Awarded To Widow In Smoking Lawsuit

Newsy (July 20, 2014) Cynthia Robinson claims R.J. Reynolds Tobacco Company hid the health and addiction risks of its products, leading to the death of her husband in 1996. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins