Hi Chirley,
You know I have received 80 units of packed red blood cells during almost 3 years - my kidney function is OK. I have never read anything about kidney damage due to transfusions but many abstracts about kidney damage that leads to anemia, that is difficult to treat.
Since dx I take oral folic acid, B12 and B6 because I understand that when you have hemolysis (the red blood cells break early and never get 120 days old as they should) as I have specially folic acid is important for the bone marrow. I don't think pernicious anaemia is common among MDS patients.
Hope the B12 injections will have effect soon

!
Kind regards
Birgitta-A