North Carolina State Laboratory of Public Health Converts to ThinPrep Imaging System for All Cervical Cancer Screening

"We are very pleased North Carolina State Laboratory of PublicHealth has elected to fully convert to ThinPrep plus Imaging. Webelieve our technology will provide the most effective cervicalscreening platform for the laboratory and the patients they serve,"said Patrick J. Sullivan, Cytyc's chairman, president, and chiefexecutive officer.

North Carolina State Laboratory of Public Health provides medicaland environmental laboratory services to public health organizationsincluding county health departments. Eight of the health departmentsparticipated in a six-month study to evaluate the ThinPrep ImagingSystem compared to manual screening beginning in March 2005. Resultsindicated an increase in sensitivity and a considerable decrease inthe unsatisfactory rate compared to manually screened ThinPrep PapTest slides. The study also demonstrated cytotechnologist productivitygains and a decrease in screening hours.

The ThinPrep Imaging System is the first fully integrated,interactive computer system that assists cytotechnologists andpathologists in the primary screening and diagnosis of ThinPrep PapTest slides. The ThinPrep Imaging System combines revolutionaryimaging technology with human interpretive expertise to improvecervical cancer screening efficiency and performance.

Cytyc Corporation is a leading women's health company thatdesigns, develops, manufactures, and markets innovative and clinicallyeffective products. Cytyc products cover a range of women's healthapplications, including cervical cancer screening, breast cancer riskassessment, treatment of excessive menstrual bleeding, and treatmentof breast cancer.

Cytyc is traded on The Nasdaq Stock Market under the symbol CYTC.Cytyc and ThinPrep are registered trademarks of Cytyc Corporation.

Forward-looking statements in this press release are made pursuantto the provisions of Section 21E of the Securities Exchange Act of1934. Investors are cautioned that statements in this press releasewhich are not strictly historical statements, including, withoutlimitation, statements relating to Cytyc's future financial condition,operating results and economic performance, and management'sexpectations regarding key customer relationships, future growthopportunities, product acceptance and business strategy, constituteforward-looking statements. These statements are based on currentexpectations, forecasts and assumptions that are subject to risks anduncertainties, which could cause actual outcomes and results to differmaterially from those statements. Risks and uncertainties include,among others, dependence on key personnel and customers as well asreliance on proprietary technology, uncertainty of product developmentefforts and product acceptance, management of growth and productdiversification, entry into new market segments domestically and newinternational markets, risks associated with litigation, the effectiveintegration of acquired businesses and technologies, competition andcompetitive pricing pressures, risks associated with the FDAregulatory approval processes and healthcare reimbursement policies inthe United States and abroad, introduction of technologies that aredisruptive to Cytyc's business and operations, the impact of newaccounting requirements and governmental rules and regulations, aswell as other risks detailed in Cytyc's filings with the Securitiesand Exchange Commission, including under the heading "Certain FactorsWhich May Affect Future Results" in its 2004 Annual Report on Form10-K and its most recent Quarterly Report on Form 10-Q filed with theCommission. Cytyc cautions readers not to place undue reliance on anysuch forward-looking statements, which speak only as of the date theywere made. Cytyc disclaims any obligation to publicly update or reviseany such statements to reflect any change in its expectations orevents, conditions, or circumstances on which any such statements maybe based, or that may affect the likelihood that actual results willdiffer from those set forth in the forward-looking statements.