In the U.S., the most common weight-loss surgery is the sleeve gastrectomy.
In this procedure, the surgeon removes a large portion of the stomach to create a tubelike sleeve. Weight-loss surgery is only one part of an overall treatment plan.
In a new study, scientists 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.
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 matched based on age, sex, and body mass index (BMI), who did not have surgery.
The researchers estimate surgery patients lost about 60% of their excess weight at 10 years.
They found that after having weight-loss surgery, patients saw big reductions in the incidence of breast cancer (1.4% vs 2.7%), gynecologic cancer (0.4% vs 2.6%), kidney cancer (0.10% vs. 0.80%), brain cancer (0.20% vs 0.90%), lung cancer (0.20% vs 0.60%) and thyroid cancer (0.10% vs 0.70%).
The 10-year incidence of any new cancer in the bariatric group was much lower (5.2% vs. 12.2%) and the 10-year survival rate was much higher (92.9% vs. 78.9%) than in the non-surgical group.
The team says the benefits of cancer risk reduction through weight-loss surgery cannot be ignored and should be a consideration for patients with obesity and at high risk for cancer.
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 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.
Being 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.
If you care about weight loss, please read studies about supplement that can help healthy obese people lose weight, and avocado may help reduce inflammation in overweight people.
For more information about health, please see recent studies that vitamin D supplements strongly reduces cancer death, and results showing avoid these 5 mistakes if you want to lose weight effectively.
The study was conducted by Jared R. Miller et al and presented at the American Society for Metabolic and Bariatric Surgery (ASMBS) Annual Meeting.
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