Implications 

The biology of cancer has important implications for cancer control. At the cellular level the problem is faulty genetic control; cancer is basically a genetic disorder. But hereditary cancers such as retinoblastoma, are uncommon. Instead the disease is usually acquired from external influences which are, therefore, potentially avoidable. With current methods overall one can expect to prevent theoretically 2/3 but in practice more realistically 1/3 of cancer, and to be

able to cure about 1/3 in a developing country, and closer to 1/2 in a developed country.
 

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