Joao wants to know what happens when stem cells of our own, which have been cultivated outside the body, are reintroduced to the bloodstream. This got James Tytko thinking about autologous stem cell transplants, used as a treatment for some forms of blood cancer. He asked Tania Dexter, haematology registrar, and senior medical officer at the Anthony Nolan Institute, to help explain... Like this podcast? Please help us by supporting the Naked Scientists