This summer, prostate cancer forced New York City Mayor Rudolph W. Giuliani to drop out of a heated race for the U.S. Senate. That political bombshell brought new attention to a disease that ranks as the most common cancer among U.S. men and kills more than 30,000 of them annually.
Despite intensive study of the cancer, in which cells of the walnut-shaped prostate gland proliferate wildly, researchers have had little success identifying genes that underlie the disease.
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