Cytyc Corporation [CYTC] Chairman, President And CEO To Ring The NASDAQ Stock Market Opening Bell

NEW YORK, May 19 /PRNewswire-FirstCall/ -- The following is being issued by NASDAQ :

What: Patrick Sullivan, Chairman, President and CEO of Cytyc Corporation will preside over the opening bell to celebrate the 10- year anniversary of FDA approval of the ThinPrep(R) Pap Test and the Company's 10-year anniversary on the NASDAQ. Where: NASDAQ MarketSite - 4 Times Square - 43rd & Broadway - Broadcast Studio When: Monday May 22nd, 2006 at 9:30 a.m. EDT Contacts: Anne Rivers Manager, Investor Relations anne.rivers@cytc.com Jeff Keene Director, Corporate Communications jeff.keene@cytyc.com NASDAQ MarketSite: Stephanie Lowenthal; 646.441.5220 Feed Information:

The opening bell is available from 9:20 a.m. to 9:35 a.m. on uplink IA-5 C-band/transponder 14. The downlink frequency is 3980 horizontal; audio: 6.2/6.8. The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Stephanie Lowenthal at (646) 441-5220.

Photos:

To obtain a hi-resolution photograph of the Market Open, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market open of your choice.

About Cytyc Corporation [CYTC]:

Cytyc Corporation is a leading women's health company that designs, develops, manufactures, and markets innovative and clinically effective products for cervical cancer screening, breast cancer risk assessment, treatment of excessive menstrual bleeding, and treatment of breast cancer.

Cytyc is traded on The Nasdaq Stock Market under the symbol CYTC. Cytyc is a registered trademark of Cytyc Corporation.

NASDAQ

CONTACT: Anne Rivers, Manager, Investor Relations, anne.rivers@cytc.com orJeff Keene, Director, Corporate Communications, jeff.keene@cytyc.com, bothof Cytyc Corporation; or Stephanie Lowenthal of NASDAQ MarketSite,+1-646-441-5220

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