The American cancer Society estimates that in 1999, about 7,400 new cases of testicular cancer will be diagnosed in the United States. An estimated 300 men will die of testicular cancer in 1999. It may be that exposure to certain chemicals contributes to development of the disease. Studies have not yet identified any specific chemicals as being responsible. Osteosarcoma represents 5 percent of childhood cancers, with teen-agers being the most affected group.
Environmental causes have yet to be determined.
It is the fourth leading cause of cancer death among Americans. Heavy exposure to certain pesticides, certain dyes and certain chemicals related to gasoline may increase the risk of developing cancer of the pancreas. The American cancer Society estimates that 30,200 new cases of leukemia will be diagnosed in the United States during 1999. The two main types of chronic leukemia are chronic lymphocytic leukemia, with 7800 new cases expected in 1999, and chronic myeloid leukemia, with 4,500 new cases expected. Hairy cell leukemia is estimated to account for about 2 percent of leukemias each year.