It's a mystery, so far

Some of my lab results are back, and there's some good news in there.  My IgM level (a blood protein that's a marker for the disease) is the lowest it's ever been, at 1160, so first guess is that it's not the disease, come roaring back.  There are more results that aren't available yet, in particular an analysis of the bone marrow sample that Dr. Treon took in Boston, so that's still a tentative conclusion.  My blood iron levels are in range, so my body is apparently absorbing iron appropriately.  So what could it be?  Well, if the bone marrow is crowded with Waldenstrom cells, that could mean that the disease is active and crowding out the production of red blood cells, but then it's a question as to why the Waldenstrom cells aren't producing more IgM, and why the Rituxan treatments stopped working all of a sudden.  Another possibility is that the anemia is unrelated to the disease.  It's a fair bet that various unpleasant -oscopies may be in my future.