Hi Alcyon,
It is a pleasure to meet you, although we have heard a lot about you through Hannaha’s postings. Hannaha is an amazing and wonderful voice on this board.
I looked around a bit but did not find much information for you. Here is the final article from the trial for Ivosidenib (AG-120). https://pubmed.ncbi.nlm.nih.gov/34554208/ You can look at the tables and graphs on this report to see some characteristics of survivors although I don’t think it is specific to the “long tail” as you describe it. The information is not written for laypersons, but it looks to me as if individuals in better initial health did better than those less so. It also looks as if the researchers looked to see if the individuals in the trial had other mutations, but that there was no strong finding about the impact of the presence of other mutations. At any rate, that it what I think I saw in there.
Also, we had a few folks who participated in the AG-120 trials who posted on the board at the time. I looked through their posts but did not find anyone reporting a long survival. This is not to say none were in this group, it is just that no one with that profile posted about it.
I wish I could be of more help with your question. It is really inspiring how well you are doing with your treatment – my fingers are tightly crossed that your good results are here to stay.
Regards, Mary