Cancer cells


Cell Growth : In adults, cells normally grow and divide slowly and in a controlled way. This ensures that the number of cells in a tissue or system stays about the same. But in cancer, something goes wrong. One cell starts dividing out of control. In most types of cancer, a growing mass of cells called a tumor is formed.

Cancer cells are cells that grow and divide at an unregulated, quickened pace. Although cancer cells can be quite common in a person they are only malignant when the other cells (particularly natural killer cells) fail to recognize and/or destroy them. In the past a common belief was that cancer cells failed to be recognized and destroyed because of a weakness in the immune system. However more recent research has shown that the failure to recognize cancer cells is caused by the lack of particular co-stimulated molecules that aid in the way antigens react with lymphocytes.


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