A Yale physician has begun using the 3D printers at Yale's Center for Engineering and Innovation Design to make 3D organs — precise replicas of actual patients' organs. Here, a knee with tumor. (Image by Yale CEID)
 

A Yale physician has begun using the 3D printers at Yale's Center for Engineering and Innovation Design to make 3D organs — precise replicas of actual patients' organs. Here, a knee with tumor. (Image by Yale CEID)