Let me preface this question with the admission that I have next to no knowledge of genetic research, short of that involved with my own syndrome. However, is the quote above stating that the identified UTX gene is an unexpected common denominator, or that they saw it in only 10% of one cancer type and 1/12 of the other? Because if the latter interpretation is correct, this doesn't sound like a "master cancer" gene. Maybe someone with a bit more understanding could clarify the significance?
Nonetheless, I'm glad to hear they've made this breakthrough, and hope it leads to some long-overdue cures.