Chemotherapy can cause damage to healthy cells which triggers them to secrete a protein that sustains tumor growth and resistance to further treatment, a new study said Sunday.Around 90% of patients with solid cancers, such as breast, prostate, lung and colon, that spread - metastatic disease - develop resistance to chemotherapy.Treatment is usually given at intervals, so that the body is not overwhelmed by its toxicity.  But that allows time for tumor cells to recover and develop … [Read more...]