"Hedgehog" refers to Hedgehog pathway inhibitors, a
promising area of research.
This may be the trial named
Ribavirin and Hedgehog Inhibitor With or Without Azacytidine in AML, based on giving Rebetol (ribavirin) with Erivedge (vismodegib) and/or Vidaza (azacytidine).
I hope it goes well for Dave.