Abstract
A cancer is an unusual or abnormal cell growth due to multiple cell divisions in the old cells that do not die. These grow uncontrollably and form into a mass of tissue called as tumours. For a healthy or normal cell to turn into a cancerous cell the genes that are present within the cell are responsible for the cell growth, in which when there is difference in signalling or wrong expression by the gene, the cell divides uncontrollably. The great change over from normal cell to a cancer cell is similar to that of a chain reaction, where the initial errors lead to severe errors and then allows cell to escape from normal tissue growth and further, this rebellion process will end up with the normal cell growth and forms tumours. The rationale, the types of cancers was discussed in this commentary.
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