Colorectal Cancer Archive

Scary or misleading claims about things that may cause cancer are so plentiful that it's hard to know which ones to take seriously. A new website developed by experts aims to provide reliable information about whether a particular cancer claim is true.

Most people don't benefit from colonoscopies after age 75, but before stopping they should have a discussion with their doctor.

Men are less likely than women to get regular exams and tests, especially when they are younger. But as they age, routine screenings are essential. There are certain tests most men should have at some point, including ones for colon cancer, high blood pressure, hepatitis C, diabetes, and HIV. Other tests men should consider if they are at high risk for specific ailments, such as abdominal aortic aneurysm, hepatitis B, and lung cancer.

A study published online Oct. 4, 2021, by the journal Medicine & Science in Sports & Exercise found that about 46,000 U.S. cancer cases per year can be attributed to getting less than 300 minutes of moderate-intensity exercise per week.

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Regular aspirin use is associated with a reduced risk for developing colorectal cancer in older age — but you won't get the benefit if you start the therapy too late in life, according to a Harvard study published online Jan. 21, 2021, by JAMA Oncology. Researchers combined the results of two large studies involving a total of more than 94,000 people who answered health questionnaires regularly and were followed for three decades. Compared with people who didn't take aspirin, people ages 70 or older who took either 325 milligrams (mg) or 81 mg of aspirin at least twice per week had a 20% lower risk for developing colorectal cancer — but only if they had started the therapy by age 65. Starting aspirin therapy at or after age 70 was not associated with significant protection against colorectal cancer. The study was observational and does not prove whether aspirin can or cannot ward off colorectal cancer. But other observational studies have also shown an association between aspirin use and lower colorectal cancer risk. Like any medicine, aspirin isn't risk-free: regular use increases the risk for gastrointestinal bleeding. If you happen to be taking aspirin regularly for other reasons, this might be an added benefit.

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In the last decade, overall rates of colorectal cancer have been falling among the general population in the US. However, African Americans are more likely to develop colorectal cancer at younger ages, and to die from it. The reasons for this disparity are unclear, but they are rooted in socioeconomic and racial inequities.

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The pandemic may have you feeling reluctant to seek medical treatment. But when it comes to cancer care, even a short delay in treatment may lead to deadly outcomes, according to a review of 34 studies published online Nov. 4, 2020, by BMJ. Researchers evaluated treatment delay and survival in more than a million people who had cancer of the bladder, breast, colon, rectum, lung, cervix, or head and neck. Each four-week delay in treatment — whether surgery, radiation therapy, or medication (such as chemotherapy or immunotherapy) — was associated with an increase of 6% to 8% in the likelihood of dying during the study period. Scientists say delays of up to eight weeks and 12 weeks further increased the risk of death. For example, in women who delayed breast cancer surgery by eight weeks, there was a 17% increased death risk; women who delayed surgery by 12 weeks had a 26% increase. Keep in mind, there are lots of unavoidable reasons why cancer treatment might be delayed, such as not being strong enough to undergo procedures or scheduling issues at a treatment center. But if there isn't a good reason to delay, it's best to get treatment as soon as possible.

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