The genetic basis of both sporadic and inherited cancers has
been confirmed by molecular studies. The three main classes of
genes known to predispose to malignancy are oncogenes,
tumour suppressor genes and genes involved in DNA mismatch
repair. In addition, specific mutagenic defects from
environmental carcinogens and viral infections (notably
hepatitis B) have been identified.
Saturday, April 11, 2009
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