Scientists from Gundersen Lutheran Health System found people with obesity were at least two times more likely to develop certain types of cancer and 3.5 times more likely to die from the disease than those who had weight-loss surgery.
They found that after having weight-loss surgery, patients saw big reductions in the incidence of breast cancer, gynecologic cancer, kidney cancer, brain cancer, lung cancer, and thyroid cancer.
The research was presented at the American Society for Metabolic and Bariatric Surgery (ASMBS) Annual Meeting and was conducted by Jared R. Miller et al.
In the study, the team analyzed data from 1,620 patients who had either gastric bypass surgery (1,265 patients) or sleeve gastrectomy (355 patients) and 2,156 patients who did not have surgery.
The researchers found the 10-year incidence of any new cancer in the weight loss surgery group was much lower and the 10-year survival rate was much higher than in the non-surgical group.
They estimated surgery patients lost about 60% of their excess weight at 10 years.
The U.S. Centers for Disease Control and Prevention (CDC) estimates more than 650,000 obesity-associated cancers occur in the United States each year.
From 2005 to 2014, most cancers associated with overweight and obesity increased by 7%, while the rate of new cancers not associated with excess weight dropped by 13%.
According to the American Society of Clinical Oncology (ASCO), obesity is a major unrecognized risk factor for cancer and is associated with worsened prognosis after a cancer diagnosis.
Overweight and obesity can cause changes in the body that could lead to cancer, including long-lasting inflammation and high insulin levels.
The risk of cancer increases the more excess weight a person gains and the longer they have overweight or obese.
Researchers say that weight-loss surgery has proven to be the most effective long-term treatment for obesity and now it’s increasingly being looked upon as a preventative treatment, not only for cancer but for heart disease, stroke, and type 2 diabetes too.
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