The problem is that at most patients colon cancer has spread to many other locations, and the treatment can not be directed to a single site. The best treatment option in this situation is chemotherapy. Chemotherapy is done by injecting, directly in the blood, certain substances that have the ability of killing cancer cells. Chemotherapy has severe side effects like loss of hair, fatigue, loss of appetite, fever, and many more. The survival rate for chemotherapy-treated patients is not too high, but it increases each year and new techniques are continuously researched and developed.
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