Long considered the most effective cancer-fighting treatment, chemotherapy may actually make cancer worse, according to a shocking new study. The extremely aggressive therapy, which kills both cancerous and healthy cells indiscriminately, can cause healthy cells to secrete a protein that sustains tumor growth and resistance to further treatment.
Researchers in the United States made the "completely unexpected" finding while seeking to explain why cancer cells are so resilient inside the human body when they are easy to kill in the lab.