Now that a donor has been recruited, Dr. Rossetti thinks that we will be able to “have stem cells by mid December”. No dates are firm yet, but we should be able to have a firm schedule in place by the end of next week.
Beth’s blood counts continue to be critically low – her white blood cells yesterday fell below 1.0 (“.94”) for the first time since I’ve been watching the numbers. And as I noted, her hemoglobin was 7.2, and her platelets were only 18 (again, lowest I’ve seen them). So today, Tuesday, she’ll go to Jefferson Hospital for her (7th of 7) injections of Vidaza, for two or more units of blood, and also, for platelets.
Beth’s bone marrow is defective, and every stem cell she produces is defective, and so the goal over the next few weeks (including the “intensive chemotherapy” and radiation) will be to bring her “as close to zero bone marrow” as she can get. The Vidaza, while not enabling her to produce good blood cells as promised, has at least gotten her most of the way there already. And that’s a good thing. [Also a “God” thing, as I had written at first.] The reason you want all of it gone is to reduce the chances of relapse down the road. And in addition to the “intensive chemotherapy”, the full body irradiation “cuts relapse rates 20%”, according to Dr. Rossetti. Every little bit helps.
Once the new stem cells are transplanted, then Beth’s numbers should begin to go in the right direction. Her white cells should begin to recover within 2-3 weeks. Engraftment should occur on or before day 30. Hemoglobin production should start in about three months. Anti-rejection drugs will be administered between days 35 and 90 – more or less to either to control or enable some “graft-vs-host” (GVH) effect. To some degree, the GVH has a “mopping up” effect – the immunity of the new stem cells will target and destroy any remaining defective bone marrow, or any remaining defective stem cells.
Too much, to be sure, can cause problems. But this is what the donor search has been all about: matching on precisely the right DNA characteristics, to give just enough, but not too much, GVH.