Novel Investigational Regimen Combining Radiation Enhancing Agent With Ibritumomab Tiuxetan (Zevalin(R)) Produces High Rate of Complete Responses in Patients With Rituximab-Refractory Follicular Non-Hodgkin'...((8 to 34 monthsafter treatment). Zevalin...)

Patients and healthcare professionals can visit http://www.zevalin.com for more information.

About Cell Therapeutics, Inc.

Headquartered in Seattle, CTI is a biopharmaceutical company committed to developing an integrated portfolio of oncology products. For additional information, please visit http://www.CellTherapeutics.com.

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This press release includes forward-looking statements that involve a number of risks and uncertainties, the outcome of which could materially and/or adversely affect actual future results. Specifically, the risks and uncertainties that could affect the development of Zevalin include risks associated with preclinical and clinical developments in the biopharmaceutical industry in general and with Zevalin in particular including, without limitation, the potential failure of Zevalin to prove safe and effective in combination with MGd for treatment of lymphoma, determinations by regulatory, patent and administrative governmental authorities, competitive factors, technological developments, costs of developing, producing and selling Zevalin, and the risk factors listed or described from time to time in the Company's filings with the Securities and Exchange Commission including, without limitation, the Company's most recent filings on Forms 10-K, 8-K, and 10-Q. Except as may be required by law, CTI does not intend to update or alter its forward-looking statements whether as a result of new information, future events, or otherwise.

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