EXACT Sciences Corporation Release: Colon Cancer Screening Guidelines September 2006 Meeting Concluded; No Final Decision Made Regarding Any New Or Existing Technology

MARLBOROUGH, Mass.--(BUSINESS WIRE)--Sept. 22, 2006--EXACT Sciences Corporation (Nasdaq: EXAS) announced today that it has been informed that the American Cancer Society and the Multi-Society Task Force (ACS-MSTF) will continue its deliberations regarding revised colorectal cancer screening guidelines and that no final guidelines decisions on any technology were made at the meeting of the ACS-MSTF held on September 18-19, 2006 in Washington, DC. This meeting was the second in a series of meetings convened to discuss revised guidelines pertaining to new and existing technologies, including stool DNA testing, computed tomographic colonography (i.e., 'virtual colonoscopy'), traditional colonoscopy, flexible sigmoidoscopy, double contrast barium enema, and new and existing approaches to detect blood in stool (i.e., guaiac- and immunochemical-FOBT).