So we know that NPM1 is favorable, but some of the patients have clear positive MRD at the end of two cycles, and these patients need to go to transplant. But others are either low positive MRD for NPM1, so then you wonder what to do, or have other perhaps high-risk features such as FLT3 ITD mutation. And even when they achieve MRD negativity, they are considered intermediate risk, so you wonder what to do...
So we know that NPM1 is favorable, but some of the patients have clear positive MRD at the end of two cycles, and these patients need to go to transplant. But others are either low positive MRD for NPM1, so then you wonder what to do, or have other perhaps high-risk features such as FLT3 ITD mutation. And even when they achieve MRD negativity, they are considered intermediate risk, so you wonder what to do. So one option is to ask if you are able to salvage them at relapse with similar outcomes. And then you can maybe take the risk and not go to transplant at CR1, because obviously the morbidity and mortality of allogeneic transplant is significant. So that’s basically what we did. And we looked at all of these patients who did not go to transplant in CR1 and looked at the outcome. And we have two major insights from this study. One is a patient above the age of 60 or have FLT3 ITD most likely will relapse, even regardless of their MRD situation, especially in the elderly population. So these are high-risk patients for relapse. But on the other hand, once we give them either salvage or VEN-AZA-based treatments at relapse, we can achieve similar outcomes at this stage with transplants. And so I think that in certain patient populations, we can take the risk, not go to transplant in CR1, have close monitoring for this patient, and at any sign of molecular relapse, do preventive therapy and go to transplant with similar outcomes at the end, and perhaps save transplant for a fraction of patients.
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