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How oral cancer develops
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BrianOCF posted:
We know that all cancers (neoplastic transformations) result from changes (mutations) in genes which control cell behaviors. Mutated genes may result in a cell which grows and proliferates at an uncontrolled rate, is unable to repair DNA damage within itself, or refuses to self destruct or die (apoptosis). It takes more than one mutation to turn a cell cancerous. Specific classes of genes must be mutated several times to result in a neoplastic cell, which then grows in an uncontrolled manner. When a cell does become mutated to this point, it is capable of passing on the mutations to all of its progeny when it divides. Genetic mistakes randomly happen each day in the course of our bodies replacing billions of cells. Besides these random occurrences, genetic errors can be inherited, be caused by viruses, or develop as a result of exposure to chemicals or radiation. Our bodies normally have mechanisms that destroy these abnormal cells. We are now discovering some of the reasons this fails to take place, and cancers occur.
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