Abstract
Most human malignancies are caused by somatic alterations within the
cancer genome, leading to oncogene activation or tumor suppressor
gene inactivation. The sequence of the human genome has enabled systematic
approaches to identify cancer genome alterations, including point
mutations, copy number increases and decreases, loss of allelic heterozygosity,
and chromosome translocations. Systematic cancer genome analysis
has recently led to the discovery of somatic mutations in the BRAF,
PIK3CA, and EGFR genes, among others. With further development of
targeted cancer therapies and improvement in genome analysis technology,
genome-wide surveys of cancer will likely become tools for diagnosis
as well as discovery.
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