Cancer

Cancer of all types was responsible for the deaths of more than 562,800 people in 2007. Cancer refers to uncontrolled cellular growth, which can occur in many different tissue types. The most common cancers in men are prostate cancer, lung cancer and colorectal cancer, according to the CDC.. The most common cancers in women are breast cancer, followed by lung and colorectal cancer. Lung cancer causes the most deaths among men and women, followed in women by breast cancer.

A combination of hereditary and lifestyle factors likely contribute to a person's cancer risk. Quitting smoking may reduce the risk of several types of cancer, including lung and kidney cancer, according to the National Cancer Institute. There is also evidence that a diet rich in fruit and non-starchy vegetables may reduce the risk of mouth, esophagus and stomach cancers. Obesity has been linked to an increased risk of several cancers, including colorectal and endometrial cancer.