Demand for care at Philadelphia's Fox Chase Cancer Center is up, and officials say the facility must grow soon. Its plans, estimated to cost $2 billion over 25 years, are mired in a years-long tussle with neighbors, so Fox Chase recently announced building a second campus in Delaware. Opposition is already surfacing there as a Delaware hospital with a big cancer program questions the use of state money to lure an outsider into its territory. While Fox Chase's ambitions stall, other hospitals are scrambling to attract the growing numbers of cancer patients in Philadelphia's highly competitive market.