Cancer's Presence in the World

1598 WordsJan 29, 20186 Pages
Cancer represents a significant cause of morbidity and mortality worldwide, accounting for 8.2 million deaths in 2012. According to the last World Health Organization report, It reveals that it is expected that the global burden of cancer will rise from an estimated 14 million new cases per year in 2012 to 22 within the next two decades because of the aging and growth of the world population and an increasing adoption of cancer-causing behaviors. Lung, liver, stomach, colorectal and breast cancers cause the most cancer deaths each year. Cancer is spreading in the whole world, where Africa, Asia and Central and South America account for 70% of the world’s cancer deaths and more than 60% of world’s total new annual cases. Modern cancer therapy are radiotherapy, surgeries and chemotherapy. Chemotherapy is the most commonly used. Many anticancer agents where developed during the several past years. Some of these agents were effective and others failed and was withdrawn from the market. The majority of drugs used for the treatment of cancer today are cytotoxic, because they interfere with the operation of the cell's DNA. Although these agents are potent they have the potential to be very harmful to the body unless they are very specific to cancer cells which is something difficult to achieve. Furthermore, the most potent anti-cancer agents used recently have many serious side effects that reduce their clinical efficacy. Nausea, vomiting, hair loss, and low blood count, which in
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