EurekAlert -- A drug already approved for the treatment of lymphoma may also slow the growth of the most deadly bone cancer in children and teens, according to an early-stage study published online today in the International Journal of Cancer. The study drug, Bortezomib, was found to be effective against bone cancer in human cancer cell studies and in mice. While key experiments were in animals, the cancer studied closely resembled the human form and the drug has already been proven to be safe in human patients.