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Doctors use a variety of treatments and interventions to treat prostate cancer, depending on the speed of the cancer's growth and the patient's age, among other factors. Patients with fast-growing prostate tumors often receive hormone therapy to stop production of testosterone, which fuels cancer growth. All of the men in Amgen's study had tumors that did not respond well to hormone therapy, but had not yet spread beyond the prostate. While there are multiple drugs for both early and late-stage prostate cancer, Amgen argued "there is a gap in the treatment plan for those patients" enrolled in its study. Amgen said in a statement following the meeting that it would continue discussions with the FDA as it reviews the company's application. A final decision is expected by April 26. Xgeva and Prolia, the osteoporosis formulation, had combined sales of $554 million in 2011, their first full year on the market. Shares of Thousand Oaks, Calif.-based Amgen fell 87 cents, or 1.2 percent, to $68.30 per share in afternoon trading.
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