Yes, you can stream Netflix—and your body can stream stem cells. In fact, this is the up-to-the-minute thinking about how stem cells work. Here is the latest from the recent International Cartilage Repair Society meeting on stem cells, growth factors, bone marrow, fat, and PRP.

The stem cell tsunami overwhelming all of medicine is evolving. Where once it was thought that these cells could morph into anything and cure everything, our new understanding of their behavior will change how they are used. Here is where we are on the learning curve: