Ten year-old Casey Doyle was diagnosed with Synovial cell sarcoma, whose 3D Printed model he first smashed at University of Michigan's C.S. Mott Children's Hospital. Later, Surgeons at C.S. Mott Children's Hospital removed the tumor in March, and helping get him another 3-D model replica of his tumor using MRI and polylactic acid.
Source: http://www.mlive.com/news/ann-arbor/index.ssf/2016/05/10-year-old_boy_smashes_his_3-.html