1124 GMT November 28, 2020
Over the same decade, the number of cancers in those 50 and older fell by nearly three percent, the study found, webmd.com reported.
“Our findings suggest that health care providers should be more vigilant about detecting symptoms in younger patients and also should consider lowering the threshold for colonoscopy screening,” lead researcher Dr. Elie Sutton said during a media briefing. Sutton is a research fellow at Mount Sinai West Hospital in New York City.
“We really don't know why colon cancer is increasing in younger patients," he said. "We can speculate that it's due to increases in inflammatory bowel disease or a change in diet, but really there is no clear consensus on that.”
The researchers also found that colon cancer among those under 50 was often diagnosed when the cancer was already advanced, Sutton said.
About five years ago, a study found a similar trend toward young onset, Sutton said. "Between the time of the previous research and our study, we still have not adequately addressed the risk of colorectal cancer in people under the age of 50. It's critical that we reverse this trend so that we are able to reduce, and hopefully eliminate, it in all populations, regardless of age," he said.
Colon and rectal (colorectal) cancer is the third most common cancer, according to the US National Cancer Institute (NCI). The NCI estimates there will be more than 134,000 new cases in 2016. Colorectal cancer is the second leading cause of cancer deaths, second only to lung cancer, the NCI reports.
For the study, Sutton and colleagues reviewed data on more than one million colorectal cancer cases listed in the National Cancer Database from 2004 to 2013.
While the study found that the number of these cancer cases is rising about one percent a year in people under 50, the majority of cases still occur after 50, Sutton said.