Obesity is associated with a higher risk of several cancers, including cancer of the thyroid, colon, kidney, liver, gall bladder, pancreas and uterus. But the strongest association between obesity and cancer is with the esophagus. 

The esophagus is a muscular tube that connects your mouth with your stomach. It is made of skin-like cells and your saliva and liquid intake are its' only lubrication for swallowing. 

Smoking cigarettes and drinking alcoholic beverages are major causes of esophageal cancer. Now we need to add obesity too. While general obesity contributes to this risk, abdominal obesity - typically seen in men - is especially risky.