Hi Carolyn,
As far as I understand older platelets are a little larger than younger platelets - high MPV perhaps indicates that your platelets live long which is a good sign.
Your platelet count is very good for a MDS patient - my latest platelet count was 33 after treatment with Exjade that my red blood cells liked but my white blood cells and platelets disliked.
http://www.brighthub.com/science/med...les/24390.aspx
Kind regards
Birgitta-A