MARILYNN MARCHIONE AP Chief Medical Writer SAN ANTONIO (AP) — Doctors on Wednesday reported unusually good results from tests of two experimental drugs in women with an aggressive form of breast cancer that had spread widely and resisted many previous treatments. One drug showed particular ability to reach tumors in the brain, which are notoriously tough to treat. The other pairs a sort of homing device for cancer cells with a payload of chemotherapy that's released when it reaches its target. "It's a guided missile. It's able to bring the chemotherapy directly to the cancer cell," said the study leader, Dr. Ian Krop of the Dana-Farber Cancer Institute in Boston. Results were disclosed at the San Antonio Breast Cancer Symposium and in the New England Journal of Medicine. From 15%
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