Dendreon to Announce First Quarter 2005 Financial Results and Host Webcast Conference Call on May 9, 2005 SEATTLE, May 2 /PRNewswire-FirstCall/ -- Dendreon Corporation (NASDAQ: DNDN) will announce financial results for the first quarter 2005 after the markets close on Monday May 9, 2005 and will hold a webcast teleconference at 4:30 p.m. Eastern time that day. Company management will discuss financial results from the first quarter and provide a general corporate update. Access to the discussion may be obtained as follows: Conference Call LIVE Access on May 9, 2005, 1:30 p.m. PT; 4:30 p.m. ET: Phone 800-289-0494 (domestic) or +1-913-981-5520 (international); Webcast connection is available through the "Investors/Webcast & Presentations" section of Dendreon's website at http://www.dendreon.com/. REPLAY Access: Phone replay is available for 3 days by calling 888-203-1112 (domestic) or +1-719-457-0820 (international). Passcode: 4171290 Webcast replay is available for 90 days through the "Investors/Webcast & Presentations" section of Dendreon's website at http://www.dendreon.com/. Dendreon Corporation is a biotechnology company whose mission is to target cancer and transform lives through the development of innovative cancer treatments. In addition to its immunotherapies in clinical and preclinical development for a variety of cancers, Dendreon's product pipeline also includes monoclonal antibody and small molecule product candidates. Dendreon has research and development alliances with Genentech, Inc., Abgenix, Inc. and Dyax Corp. For more information about the company and its programs, visit http://www.dendreon.com/. DATASOURCE: Dendreon Corporation CONTACT: Monique M. Greer, Sr. Director, Corporate Communications of Dendreon Corporation, +1-206-829-1500 Web site: http://www.dendreon.com/

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