Hi Steve-
Took me about 2 days to get through most of this thread, and have to say it was fascinating.
My question is about my 23-month-old son whose Ambry genetic testing recently came back finding he has the common DeltaF508 mutation, as well as the (TG)12-5T variant. (He has also had 2 previous "borderline" sweat tests, with numbers in the 40s and 50s, which lead to the pulmonologist ordering the Ambry test.) The pulm he had been seeing sent us to an accredited CF center we visited 2 days ago, and the doctor there classified him as Atypical CF. He mainly presents with asthma symptoms, but also does not grow, yet is pancreatic sufficient. The CF doctor went over the Ambry results, which said the combination of this mutation and variant would usually lead to CF, but then he said that is assuming they are on different chromosomes. I think I understand what he was saying, but is it just assumed they are on different chromosomes when Ambry sends the results, or is something else needed to determine if they are on the same chromosome? The doctor really didn't say and was most interested in the standard pre-natal testing I had done with my first pregnancy eight years ago, which stated I wasn't a carrier. (And trying to dig up those records is not going to be easy, as I switched doctors due to re-locating and insurance changes three different times during that pregnancy.)And if they are on the same chromosome, what then does that mean for his diagnosis? At this point, he has been through 15 months of testing to determine why he doesn't grow very well, and also why he gets these never-ending colds and coughs and I just want an answer one way or another as to what is wrong with my child.