OSI Pharmaceuticals, Inc. (Nasdaq: OSIP) announced today that it will host a conference call on Monday, November 21, 2005 at 8:00 AM Eastern Time to discuss the progress of OSI's integration plan for its newly formed (OSI) Eyetech business unit. The Company announced yesterday the completion of its acquisition of Eyetech Pharmaceuticals, Inc., a biopharmaceutical company focused on the development and commercialization of novel therapeutics to treat eye diseases.