Exhibit 99.1

Cell Therapeutics, Inc. Reports Outcome of

Special Meeting of Shareholders

June 17, 2011 Seattle—Cell Therapeutics, Inc. (“CTI”) (NASDAQ and MTA: CTIC) announced today the results from its Special Meeting of Shareholders held on Friday, June 17, 2011. At the meeting, shareholders approved the proposal to amend CTI’s amended and restated articles of incorporation to increase the total number of authorized shares and authorized shares of common stock.

About Cell Therapeutics, Inc.

Headquartered in Seattle, CTI is a biopharmaceutical company committed to developing an integrated portfolio of oncology products aimed at making cancer more treatable. For additional information, please visit 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 include the risk factors listed or described from time to time in CTI’s filings with the U.S. Securities and Exchange Commission including, without limitation, CTI’s most recent filings on Forms 10-K, 10-Q and 8-K. 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.

Media Contact:

Dan Eramian

T: 206.272.4343

C: 206.854.1200

E: deramian@ctiseattle.com

www.CellTherapeutics.com/press_room

www.CellTherapeutics.com

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Investors Contact:

Ed Bell

T: 206.282.7100

Lindsey Jesch Logan

T: 206.272.4347

F: 206.272.4434

E: invest@ctiseattle.com

www.CellTherapeutics.com