Hi, thanks for sharing your health concerns with HCM! Well, If I were your treating Doctor for this case of leukopenia, I would like to know serial WBC total and differential counts as well as other parameters of complete hemogram for at least last 3 months, before I could say a word...However to the best of my knowledge, I would come up with three possibilities in your case; these include: 1. infective of inflammatory: like some systemic viral infection / chronic liver/kidney disease etc ! 2. The second possibility is of bone marrow failure due to radiation, chemotherapy, cancer, myelodysplasia etc. ! 3. The last possibility is of reduced production due to specific nutrients, hypoplastc or aplastic anemia or just a sign of severe megaloblastosis! It is better to consult a hematologist or hemato-oncologist than anybody else! Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.