Susan Cossabone is growing new leg bone thanks to adult stem cells. She was in a terrible head-on collision, and thought her injured leg would have to be amputated.

"I thought I would lose the leg. If you could have seen it when they cut off my favorite jeans -- you could just see bones sticking and flesh. You couldn't see much of a leg."

But world-renowned foot and ankle specialist Dr. Mark Myerson of Baltimore's Mercy Medical Center used adult stem cells to help regrow the bone in her leg, and now she is beginning to walk again.

Sites for the approved clinical trial include Baltimore, MD, Grand Rapids, MI, and Edina, MN (see the link for details.)