ALISO VIEJO, Calif., April 23, 2007 (PRIME NEWSWIRE) -- SenoRx, Inc. (Nasdaq:SENO) today announced that the underwriters of its initial public offering exercised their over-allotment option to purchase an additional 825,000 shares of its common stock at $8.00 per share. The option was granted in connection with the company’s initial public offering of 5,500,000 shares on March 29, 2007. The company granted the underwriters an option to purchase up to an additional 825,000 shares to cover over-allotments. Banc of America Securities LLC and Citigroup Global Markets Inc. are the joint bookrunning managers for the offering. Cowen and Company, LLC and Canaccord Adams Inc. are co-managers.