Did the stem cell transplant wipe out the immune system, or was it the chemotherapy?

ASD is such low-level neurology that it would only be rudimentarily affected by something which touches the brain's core processing paths like this kind of transplant, given that the transplant was successful.

I hesitate to say that stem cell transplants cure ASDs, even by an apparent observation.  But, there are other medical phenomena which result in major brain function shifts - sometimes a survived stroke or aneurysm - so I also hesitate to rule out the possibility that, in one patient, a transplant cured the condition.

The real question would be whether Asperger's is a problem that needs to be solved.  Most would say yes, but maybe not for that one patient.