Simple body parts such as bladders and blood vessels are already being produced by 3D printers for transplant, and work is proceeding toward more complex organs, such as kidneys and livers. The most promising approach so far involves using existing organs cleansed of living cells, leaving a scaffolding that can be filled with cells derived from the implant patient. "It's almost like taking an apartment building, moving everybody out ... and then really trying to repopulate that apartment building with different cells," says John LaMattina of the University of Maryland School of Medicine.

Full Story:
The Seattle Times

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