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Each mutation alters the behavior of the cell somewhat. Carcinogenesis, also called oncogenesis or tumorigenesis, is the formation of a cancer, whereby normal cells are transformed into cancer cells. The process is characterized by changes at the cellular, genetic, and epigenetic levels and abnormal cell division.
Somatic evolution in cancer. Somatic evolution is the accumulation of mutations and epimutations in somatic cells (the cells of a body, as opposed to germ plasm and stem cells) during a lifetime, and the effects of those mutations and epimutations on the fitness of those cells. This evolutionary process has first been shown by the studies of ...
A hereditary cancer syndrome ( familial/family cancer syndrome, inherited cancer syndrome, cancer predisposition syndrome, cancer syndrome, etc.) is a genetic disorder in which inherited genetic mutations in one or more genes predispose the affected individuals to the development of cancer and may also cause early onset of these cancers.
Women with deleterious mutations in either the BRCA1 or BRCA2 genes have a high risk of developing breast and/or ovarian cancer.Because different studies look at different populations, and because different types of mutations have somewhat different risks, the risk is best expressed as a range, rather than a single number.
An oncogene is a gene that has the potential to cause cancer. [ 1] In tumor cells, these genes are often mutated, or expressed at high levels. [ 2] Most normal cells undergo a preprogrammed rapid cell death ( apoptosis) if critical functions are altered and then malfunction. Activated oncogenes can cause those cells designated for apoptosis to ...
Cancer is caused by genetic changes leading to uncontrolled cell growth and tumor formation. The basic cause of sporadic (non-familial) cancers is DNA damage and genomic instability. [ 1][ 2] A minority of cancers are due to inherited genetic mutations. [ 3] Most cancers are related to environmental, lifestyle, or behavioral exposures. [ 4]
A tumor suppressor gene ( TSG ), or anti-oncogene, is a gene that regulates a cell during cell division and replication. [ 1] If the cell grows uncontrollably, it will result in cancer. When a tumor suppressor gene is mutated, it results in a loss or reduction in its function. In combination with other genetic mutations, this could allow the ...
A cancer biomarker refers to a substance or process that is indicative of the presence of cancer in the body. A biomarker may be a molecule secreted by a tumor or a specific response of the body to the presence of cancer. Genetic, [ 1] epigenetic, [ 2] proteomic, [ 3] glycomic, [ 4] and imaging biomarkers can be used for cancer diagnosis ...