because of new bionic technology. alison morrow of tampa has her story. reporter: ask 8-year-old josalyn kaldenberg how she is doing today and you d get a much different answer if you had asked her a few weeks ago. i feel good. reporter: recently diagnosed with a cancer called osteosarcoma. she faced one option, losing her entire right arm. that was the most devastating part when we thought she was going to lose her arm and you think through your mind of all of the thing that she won t be able to do. like tying your shoes or anything. reporter: but mom heidi did some research and found out about moffitt and dr. douglas lets on. this was like four days before her amputation surgery was scheduled. he agreed to a rare operation. replace her entire humorous. the long bone that connects her shoulder to her elbow with an expandible prosthesis. none been done at least in the united states of the whole humeral bone.