Dear Nekoneko, Ferriten is an iron-storing protein made in the liver, spleen, bone marrow, tumor cells, and sites of inflammation. Increased ferriten levels can be due to many causes other than blood transfusions, such as cancer and liver disease. I ran your questions by one of our hematology/oncology physicians who said if the transfusions continue he might consider using deferoxamine (Desfarel) with each transfusion. Deferoxamine is given as an intravenous (into the vein) infusion. How it works is by chelating (forming an attachment) to certain iron stores in the body which then can be removed from the blood through the urine and bile.
You can discuss this with your mother's oncologist who can determine if this may be an appropriate addition to your mother's treatment plan considering the risks and benefits, and how it might effect your mother's overall condition.