Yes,although this might be too complicated for the internet.I was diagnosed with multiple myloma innjanuary,and began chemo in February.I've also been using Filgratsim (Neupogen) since them,and I've seen a steady. drop in my white cell count,until the count was so low over the last two weeks that my chemo had to be withheld.I'm scheduled to undergo a bone marrow biopsy in a week or two.Is there any reason this problem could come about suddenly?Thank you.