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Misconception Of Cancer

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Q: Discuss various historical theories and misconception of cancer (pre 1890 's)?
A:
1) Humeral theory:
Hippocrates believed that the human body had four types of body fluid, and these four fluid are (blood, phlegm, yellow and black bile).
When these fluids are in balance the person consider healthy, the theory belief that when there is too much or too little of anybody fluid will cause disease.
Excessive amount of black bile in different body sites believed to cause the cancer.
The humeral theory of cancer remind unchanged for more over 1300 years.
2) Lymph theory:
Was purported in 18th century and it was one from the first theories to replace the humeral theory.
In this theory, one of the four humors of the body causes the cancer and it is
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