Rhinelander - Newswatch 12 learned Leanna Kossack passed away Monday afternoon.

Leanna was a Rhinelander teenager who was battling a rare form of cancer.

A fast-moving tumor had wrapped itself around her spine. Rhinelander Mayor Dick Johns declared last Friday Leanna Kossack day.

Saturday, her family and friends held a benefit in downtown Rhinelander that she was able to be at.

Leanna passed away at 3:05 this afternoon. She was just 17 years old.