Successful treatment of a child with t/myeloid acute bilineal leukemia associated with tlx3/bcl11b fusion and 9q deletion?

Yes. This is uncommon, but certainly treatable. The treatments are not straightforward, but intense treatment is typically required. There is a report recently of successful treatment with bone marrow transplant.
Can beat it. Chemotherpay followed by a transplant eval can potentially be curable in this cas e.