A rise in the number of U.S. cancer cases will lead directly
to an increase in the number of cancer deaths, and in the
near future cancer is expected to overtake heart disease as
the country’s leading cause of death ( 17).
These challenges are not unique to the United States; they
are also global problems (see sidebar on Cancer: A Global
Challenge). Thus, it is imperative that the global biomedical
research community collaborates to address cancer
incidence and mortality, and spur continued advances
almost 70 percent of
u.s. cancer diagnoses occur
among those age
55 and older.