Amit Gupta on Living with Leukemia and the Search for a Donor Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email A section of a bone marrow embolus. ( Pulmonary Pathology / flickr ) Produced by Shia Levitt and Sitara Nieves Produced by PRI and WNYC