Obesity combined with a sedentary lifestyle increases your risk for developing certain types of cancers, specifically breast, colorectal, endometrial, esophageal and kidney cancers. Excess weight may also play a role in your risk of developing gallbladder, ovarian and pancreatic cancers. In fact, as many as 3.2 percent of new cancer cases diagnosed in 2002 were attributed to obesity [source: Polednak].
Researchers are still trying to figure out why obesity is associated with certain cancers, and under consideration are how an obese body handles insulin, hormones and globulin, a protein found in blood.
Obesity not only increases your risk of receiving a cancer diagnosis, but it also increases your risk of dying from cancer. Based on statistics from 2002, an estimated 14 percent of cancer-related deaths in men and 20 percent in women are associated with obesity [source: Calle et al].