Hi Chirley,
I too have been told that no one knows what the exact cause of my AA is and that used to bug me. I used to feel that I must know the cause so I can fix it and become good again, which might have something to do with the fear of rejection by not able to be perfect. Nowadays I appreciate their honesty and can kind of relate to the need for being brutally honest at some circumstances. I think science will always be science. The grey areas are probably where the profession yet to discover and work on.
I feel for you that some of your families and yourself are troubled by auto immune diseases and hodgkins lymphoma. I was off Cyclosporin a month ago, my platelets had dropped but everything else seems fine. Can't wait to go overseas to Tasmania
Murph