Observational data suggest that the risk of certain types of cancer may be increased in individuals with obesity and that this risk may be lower after bariatric surgery. JAMA Deputy Editor Gregory Curfman, MD, explores this in detail with Steven Nissen, MD, an author of a JAMA study on this topic, and Anita Courcoulas, MD, MPH, author of an accompanying editorial. Related Content: Association of Bariatric Surgery With Cancer Risk and Mortality in Adults With Obesity Bariatric Surgery and Cancer Risk