I was put on a marrow registry 17 years ago after my sister died of TTP a very very rare blood disease (not genetic). I was notified yesterday that I am a match to a 51 year old woman. I got so so excited. In filling out the questionnaire I remembered offer living sister had been diagnosed with a pt20210 gene that can make her or even me if I had the same gene prone to clotting. I wrote that down. I have tried to google whether pt20210 can donate marrow with effectively results for the recipient. I know that they will do stacks of tests. I just thought that there might be a quick answer.....but I just want to help her if I can to safety.