By Bill Berkrot (Reuters) - Pfizer Inc's Xalkori, which treats lung cancer patients with a specific gene mutation, proved effective in shrinking tumors in those with an even rarer form of the disease, according to data presented at a medical meeting on Saturday. In the study of 50 non-small cell lung cancer patients with a rearrangement of the ROS1 gene, Xalkori treatment led to significant tumor shrinkage in 36 of them, or 72 percent, and halted tumor growth in an additional 9 patients, researchers reported. ...
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