Liver cancer appears to have a link to obesity. A high BMI, large waistline, and type 2 diabetes are independently very closely associated with liver cancer. Rates have tripled since the 1970s as has obesity in many Americans. Each of the conditions increases risk and combining them appears to be additive.
Developing non-alcoholic fatty liver disease, a common occurrence in obese people, can lead to liver damage. As the cells regenerate themselves, the odds for developing cancerous cells increases. Liver cancer has long been associated with alcoholism or hepatitis infections. The reality suggests that obesity is a far more likely suspect.