1) Heredity is among the factors that influence the occurrences of cancer in human life. However, the hereditary lines in an individual cannot be used to diagnose a cancer victim. Rather, this makes it difficult if not impossible to actually say what will become of a cancer patient. There has been striking similarity in the development of breast cancers in the life of people of the same family, especially with identical twins.
2) Cancer is not contagious. There is no proven fact that shows that one can contact cancer by taking care of another cancer patient.
3) There is no scientifically proven influence that diet has on the development of any type of cancer. There are people that believe that some diets has some contributing factors towards the development of cancer, but since there is no scientifically proved evidence presently either in support of it or not, there is no basis also to say that such belief is wrong.
4) A repeated injury or a long term irritation has the potential to cause cancer.
5) Cancer sometimes behaves like infections, and certain animal experiments of malignant tumors seemed to stimulate cancer formation.
6) Certain hormones in the body, like the estrogenic hormones of the ovary stimulate the growth of cancer in the body. The implication of this is a suggestion that the existence of unbalanced hormone formation or growth in the body can lead to the development of cancer.
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