The formation of cancer cells
The conditions that can cause changes in normal cells into cancer cells is hyperplasia, dysplasia, and neoplasia. Hyperplasia is a condition when normal cells in the network grows in abundance. Dysplasia is a condition when the cells grow abnormally and are generally seen a change in the nucleus. At this stage the nucleus size varies, increased mitotic activity, and there is no typical cytoplasm associated with cell differentiation in the network. Neoplasia is a condition of cells in tissues that had proliferated abnormally and invasive properties.
Carcinogenesis in humans is a tiered process as a result of exposure to a carcinogen that is often encountered in the environment, throughout life, either through consumption or infections. There are four levels of carcinogenesis:
* The initiation of tumor
* Promotion tumor
* Conversion of malignant
* Progression tumor
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