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In Study, Drug Delays Worsening of Breast Cancer, With Fewer Side Effects
New York Times

A drug that delivers a powerful poison to tumors without some of the side effects of traditional treatments can delay the worsening of breast cancer and also appears to substantially prolong lives, according to results of a study presented here Saturday. Besides representing an advance in treating breast cancer, the success in the clinical trial validates an idea that is now being pursued by numerous pharmaceutical companies to treat various types of cancer in a way that delivers drugs to cancerous cells while sparing healthy ones.