what is the cause of cancer
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The Cancer happen in a human body for indefinite cell division in blood..
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- Transformation of normal cells into cancerous neoplastic cells may be induced by physical, chemical or biological agents.
- Ionizing radiations like X-rays and gamma rays and non-ionizing radiations like UV rays cause
- DNA damage leading to neoplastic transformation.
- The chemical carcinogens present in tobacco smoke cause lung cancer.
- Cancer causing viruses called oncogenic viruses have genes called viral oncogenes.
- Several genes called cellular oncogene or proto oncogenes, when activated under certain conditions could lead to oncogenic transformation of the cells.
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