My mother and her sister needed blood transfusions in their 80 s. My mother was diagnosed with melodysplacia and also got iron transfusions. When I was in my late 30 s, my red blood cell results were determined as enlarged in a blood test. I m 67 and have numbness and tingling in my extremeties. I have had total hip replacement in 2016 and recently consulted a back surgeon. They both ruled out skeletal problems and thought it might be a deficiency. What deficiency would cause my symptoms?