SUMMIT, N.J.--(BUSINESS WIRE)--Celgene Corporation (NASDAQ: CELG) today announced its presentation at Jefferies 2nd Annual Healthcare Conference on Wednesday, June 25, 2008 at 9:30 a.m. EDT will be webcast live and will be available in the investor relations section of the company’s website at www.celgene.com. David W. Gryska, Senior Vice President and Chief Financial Officer, will provide an overview of the company.