More than half a million Americans die of cancer each year. However, if people adopted healthy habits, it is estimated that Choose...10%25%50%67% of all cancers could be prevented. Cancer is defined as the unregulated growth of cells in the body. A mass of abnormal cells growing in a unregulated manner is a Choose...cancer metastasis tumor malignancy. Cancers are classified according to the kinds of tissue in which they originate. Cancer arising in blood cells is called Choose...leukemia and lymphoma carcinoma sarcomamelanoma Susceptibility to certain kinds of cancer can be inherited but not the cancer itself. All cancers originate from exposure to environmental agents such as Choose...chemicals radiation viruses all of the above that alter a cell's properties . The study of the causes of diseases and how they differ in frequency among populations is called Choose...pathologyoncologyepidemiologyradiology. One form of lung cancer is mesothelioma which is caused by exposure to Choose...cigarette smoke pesticidesasbestos animal fats . Mutations in the DNA of cells usually begins the process of transforming a normal cell into a cancer cell. The primary cause of mutations in lung cancer cells is exposure to Choose...cigarette smoke smogozone sunlight and exposure to Choose...cigarette smoke smog ozone sunlight causes skin cancer. Diet also plays an important role in helping to prevent cancer. One dietary recommendation is to increase consumption of Choose...bread and potatoes cruciferous vegetables and fiber milk and eggs chicken and fish which may reduce the risk of developing many kinds of cancer. If cancer does occur, the most effective treatment is Choose...radiation chemotherapy surgery all of the above . Early detection of cancer also is important to successful treatment and recovery.