Researchers at the Stanford University School of Medicine have developed a way to produce a cheap and reusable diagnostic 'lab on a chip' with the help of an ordinary inkjet printer. The lab on a chip has the potential to diagnose cancer early by detecting tumour cells that circulate in the bloodstream.  A combination of microfuidics, electronics and inkjet printing technology, the lab on a chip is a two-part system. The first is a clear silicone microfuidic chamber for housing cells and a reusable electronic strip. The second part is a regular inket printer that can be used to print the elctronic strip onto a flexible sheet of polyester using commercially available conductive nanoparticle ink. One chip can be produced in about 20 minutes at a cost of one cent.