In a nutshell
This study assessed whether smoking increased the chance for spread of colorectal cancer (CRC) to the lungs. The study found that smoking may be a risk factor for cancer spread to the lungs.
Some background
Smoking is a known risk factor for colorectal cancer. Colorectal cancer is commonly known to spread to the liver when it is damaged. Smoking causes scarring and inflammation of the lungs. This may allow cancer to more easily spread to the area.
Methods & findings
The study looked at 567 patients with Stage I (185), II (199), or III (183) CRC. They were divided into three groups; 93 current smokers, 119 former smokers, and 355 never smokers. Patients were followed for up to 6 years.
Cancer spread to the lungs in 39 patients. 20 of these patients were either former or current smokers.
Current smokers were found to be more than twice as likely to have metastasis to the lungs.
The bottom line
The study concluded that smoking increases the chance of colorectal cancer spreading to the lungs. The authors suggested that current smokers should be screened for cancer spread to the lungs, and should be encouraged to quit smoking.
The fine print
The study did not specify the type of smoking. A future study may help a better understanding of how smoking causes cancer spread to the lungs from the colon.
What’s next?
Discuss with your doctor about quitting smoking.
Published By :
Colorectal Disease
Date :
Jul 29, 2017
