…if it really works:

Associate Professor Michael King of the University of Rochester Biomedical Engineering Department has invented a de-vice that filters the blood for cancer and stem cells. When he captures cancer cells, he kills them. When he captures stem cells, he harvests them for later use in tissue engineering, bone marrow transplants, and other applications that treat human disease and improve health.

It’s not clear from the article how close it is to actual use on humans.