A new kind of prosthetic limb depends on carbon fibre and computer chips—and the reëngineering of muscles, tendons, and bone.

A man who was diagnosed with bone cancer as a teenager had his prosthetic leg, valued at $8,000, stolen out of the trunk of ...

But in children, teens, and younger adults, it often starts in your upper arm bone close to your shoulder or your leg bone close to your knee. It tends to grow fast and spread to other parts of ...