MARLBOROUGH, Mass.--(BUSINESS WIRE)--Cytyc Corporation (Nasdaq: CYTC) today announced that its unconditional A$3.25 cash per share tender offer to acquire Vision Systems Limited (ASX: VSL), dispatched to Vision Systems shareholders on 2 October 2006, will remain open for Vision Systems shareholders to accept until 17 November 2006, unless withdrawn or extended further in accordance with the Australian Corporations Act.
