The family of a 17-year-old leukemia patient has sued health insurance giant Cigna Corp. for her death in 2007 after the company initially refused to pay for a liver transplant. The lawsuit filed last week in Los Angeles County Superior Court alleges breach of contract, unfair business practices and intentional infliction of emotional distress. The suit accuses Cigna of delaying and rejecting valid claims, which resulted in the wrongful death of Nataline Sarkisyan. The Philadelphia-based insurer eventually approved the transplant after Sarkisyan's family held a rally outside Cigna's Los Angeles office. Nataline, however, died hours after the approval was secured.