CancerVax to Webcast Corporate Presentation at BioCentury Newsmakers Conference.

CARLSBAD, Calif. -- CancerVax Corporation (NASDAQ:CNVX) announced today that President and CEO David F. Hale will give a presentation on Thursday September 9, 2004 at 4:00 p.m. EST (1:00 p.m. PST) during the BioCentury Newsmakers Conference. Mr. Hale's presentation will provide an overview of the Company's pipeline of biological products for the treatment and control of cancer, including Canvaxin(TM), a specific active immunotherapeutic product candidate currently being evaluated in two ongoing Phase 3 clinical trials for the treatment of advanced-stage melanoma.

This live recording of CancerVax's presentation is being webcast by CCBN and will be available at http://ir.cancervax.com. To access the presentation, click on the link entitled "Event Schedule" on the left side of the screen. The webcast will be available for 30 days and then archived.

The webcast is also being distributed over CCBN's Investor Distribution Network to both institutional and individual investors. Individual investors can listen to the call through CCBN's individual investor center at www.fulldisclosure.com or by visiting any of the investor sites in CCBN's Individual Investor Network. Institutional investors can access the call via CCBN's password-protected event management site, StreetEvents (www.streetevents.com).

About CancerVax Corporation (www.cancervax.com)

CancerVax Corporation is a biotechnology company focused on the research, development and commercialization of novel biological products for the treatment and control of cancer. The Company's lead product candidate, Canvaxin(TM), is one of a new class of products being developed in the area of specific active immunotherapy, also known as therapeutic cancer vaccines. Canvaxin(TM) is currently being studied in two international Phase 3 clinical trials for the treatment of patients with Stage III or Stage IV, or advanced-stage, melanoma. The Company is also finalizing the design of exploratory Phase 2 clinical trials for patients with other advanced-stage solid tumors. In addition to Canvaxin(TM), CancerVax has licensed three specific active immunotherapeutic product candidates targeting the epidermal growth factor receptor signaling pathway, including SAI-EGF, which has been studied in Phase 2 clinical trials. The Company plans to identify and develop new product candidates based on its proprietary specific active immunotherapy, anti-angiogenesis and T-oligo, or telomere homolog oligonucleotide, technology, as well as on its human monoclonal antibodies. CancerVax's corporate headquarters and research and development facility is located in Carlsbad, California, and its biologics manufacturing facility is located in the Los Angeles area.

Forward-Looking Statements

CancerVax cautions you that statements included in this press release that are not a description of historical facts are forward-looking statements. The inclusion of forward-looking statements should not be regarded as a representation by CancerVax that any of its plans will be achieved. Actual results may differ materially from those set forth in this release due to the risks and uncertainties inherent in CancerVax's business including, without limitation, statements about: difficulties or delays in developing, testing, obtaining regulatory approval, producing and marketing its technologies and product candidates; unexpected adverse side effects or inadequate therapeutic efficacy of its products that could delay or prevent product development or commercialization, or that could result in recalls or product liability claims; the progress and timing of its clinical trials; changes in the laws or regulations of the United States or Cuba related to the conduct of our business with CIMAB, S.A., that could adversely affect our ability to develop and commercialize the specific active immunotherapeutic product candidates that we have licensed from that company; CancerVax's inability to protect its intellectual property and proprietary technology and to maintain and enforce its licensing arrangements with various third party licensors; the scope and validity of patent protection for its products; competition from other pharmaceutical or biotechnology companies; and other risks detailed in CancerVax's Securities and Exchange Commission filings, including CancerVax's Annual Report on Form 10-K for the fiscal year ended December 31, 2003 and its Quarterly Report on Form 10-Q for the fiscal quarter ended June 30, 2004. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date hereof. All forward-looking statements are qualified in their entirety by this cautionary statement and CancerVax undertakes no obligation to revise or update this news release to reflect events or circumstances after the date hereof.

CancerVax(R) is a registered trademark of CancerVax Corporation.

Canvaxin(TM) is a trademark of CancerVax Corporation.