Hi Grifmat,
Very interesting that your mother will receive Promacta - hopefully she will respond to that drug for low platelets. Promacta is only approved for ITP as far as I know. If they think your mother has ITP they should try Prednisone or a similar drug again and stop the platelet transfusions since they don't help ITP patients.
Try this link for very good info info about ITP – I have followed it since my dx 2006 because my dysfunctional platelets has been as low as 22. You have to register.
http://www.pdsa.org/treatments/conventional.html
Kind regards
Birgitta-A