Cell Genesys, Inc. Amends and Extends “Modified Dutch Auction” Tender Offer for up to $80 Million Aggregate Principal Amount of Its Convertible Debt Securities

SOUTH SAN FRANCISCO, Calif.--(BUSINESS WIRE)--Cell Genesys, Inc. (NASDAQ:CEGE) today announced that it has amended and extended its “Modified Dutch Auction” tender offer for a portion of its outstanding 3.125% Convertible Senior Notes due 2011.