On June 22, BJ had a bone marrow biopsy. It marked one month from his relapse diagnosis. We have been hoping that the past month of induction cycle chemo had wiped out most (preferably all) of the blast cells in his marrow.
At his relapse, 70% of his marrow were blast cells, and after a month of chemo, his MRD (minimum residual disease) is now 11%.
This was very disappointing news. To put this in perspective, at his initial diagnosis in 2012, his marrow contained 96% blast cells. After his first induction cycle back then, his MRD was 0.09%.
The level of 0.09% put him in a very high risk category for relapse. The original 0.09% of leukemia blast cells that didn't get killed by the chemo are the cells responsible for the relapse.
We were both assured that we have time to get it down to at least 0.01% before the transplant, but when your child's life depends on it, you want it now.