Cancer - Essay Example

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Cancer is an abnormal production of the cells of an organism which are proliferated in an uncontrolled way and may spread from the site of their origin. The term cancer is commonly used to describe all types of malignant tumors. These may be the swellings of any tissue of the…
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Download file to see previous pages There are many different types of cancers originating in the human body owing to the different types of cells in the body. A few examples of cancers are skin cancer, lung cancer, prostate cancer and breast cancer. Cancer is an abnormal multiplication of the cells which may originate in any cell of the human body owing to the lack regulatory processes and this pathological state can be treated by different treatment modalities (Kumar et al 2005).
Under the microscope, cancer cells reveal different structural characteristics because of which they can be differentiated from the normal cells of the body. They are pleomorphic in nature, which means that they have a tendency to have a variable size and shape which is not in accordance with the normal cells. The cancer cells have different size and different shapes. Most of the cancer cells have large nuclei in comparison to the surrounding normal tissue cells and the nuclei of the cancerous cells contain abnormal number of chromosomes, a condition known as aneuploidy. The aneuploidy may occur due to a mutation or deletion of a chromosome. The cell membrane of the cancer cells produces surface enzymes which have the ability to damage the basement membrane of tissues. This characteristic assists in the spread of the cancer from its site of origin to the surrounding non-cancerous cells and damages them as well. The cancer cells show increased rate of mitosis. Mitosis is the process of the reproduction of the new cells and hence the cancer increases in its size and crosses its boundaries to spread out of its confines. The cancer cells have differences in metabolism in comparison to normal cells. Their metabolism is more anaerobic and therefore they may even combat hypoxic conditions. The cancer cells have the propensity to spread from the primary cancer site from where the tumor begins to grow to the adjacent normal tissues. This phenomenon is ...Download file to see next pagesRead More
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