My dad (age:75) has been getting blood transfusions since May (2 units about 1 a month). He is anemic, tired, has achy joints, had headaches, and passed out temporaraily once. He has had an upper & lower GI, bone marrow test, did a stool sample, had a colonoscopy and ct scan and x-rays. He has a hemotologist, MD, cancer specialist and VA doctor stumped. They do not find where he is passing blood, and the bone marrow test was ok. I thought perhaps he had pernicious anemia, but the doctor says his B12 levels were fine. We are all stumped, and dad is very frustrated. Any suggestions?