Berean Research has the report:
It was lung cancer. Sadly, the emergent-New Ager clung to her teachings that Christendom must evolve. She frequently appeared with Brian McLaren, Tony Jones, Doug Pagitt and those of other faiths to ring in a new era in the modern Church. (See “Emerging Towards Convergence”)
Tickle believed that throughout history, the Christian Church evolves every 500 years or so, and we are ripe for another paradigm shift. She wrote a book, Embracing Emergence Christianity: Phyllis Tickle on the Church’s Next Rummage Sale. Here is the publisher’s description of this latest apostasy: