You guys aren't gonna believe this. Mutation frustration.
I was genotyped in 1997 and was told that my mutations are DF508 and G542X. So when I was looking back through some visit notes I was surprised to see B542X listed as one of my mutations. So I emailed my team to have them fix it.
Well....one of the docs called me. He remembered hunting through my charts and records 7 years ago when I started going to my current clinic because he saw B542X in there. He looked at everything he could get from my 2 previous adult CF centers and they had something similar to B542X in my records. One clinic had B5442X, the other had B524X.
He could see the date that my genotyping was done and that it was at my last children's clinic, but he couldn't get the results of the original test because it's almost 30 years old now. And it turns out that B542X actually IS a mutation but he can only find a single article about it from 1992 in Russia.
Now, the chances of me having B542X are astronomical. G542X is the second most common mutation and prevelent in Ashkanazi Jews, and I have have Ashkanazi ancestors. But without retesting me or getting the results of that original test there's just isn't any way to know 100%.
So even though we know that it it is 99.9999% likely that I have G542X we both really want to know for sure! They're going to see if they can get the test results from 1997. I'm going to see if there is a way to get my brother's results but that could be tricky because he died in 2018 so he obviously can't sign a release. If none of that works I'll try to get retested but it could be too expensive. 🥴