The suit states that Cigna treated Bretta Karp and other female employees less favorably than their male peers by denying women rightful promotions and pay raises and fostering a hostile work environment. The lawsuit…is seeking class-action status...“We are committed to diversity and equal opportunity,’’ the company said…Despite receiving favorable reviews and winning performance awards, Karp had her pay and title reduced without explanation…and two of her markets…were reassigned to men…Karp was told she was not given a promotion, which went to a less experienced male employee…Karp’s lawyer, David Sanford, said the suit could potentially involve thousands of women. Besides $100 million in monetary damages, it seeks structural changes in promotion, performance evaluation, and other practices at Cigna to prevent further gender discrimination.