Hi Matt's Mom,
I'm glad you found the thread ok and I have tell you I'm as interested in your experiences as you are ours. This battle has been tough, but it has gotten better with time, at least in our case. The only problem is it doesn't seem to end, just when things get better, it rears its ugly head again.
I just pulled out Karly's Genetic testing and here's what it says:
Mutations: No Reported Mutions detected
Novel Variations: No Novel Variations Detected
Polymorphisms: M470V/M470V
7T/7T variant
The way our doctor described this is she doesn't have Cystic Fibrosis, however she might exibit some of the same health problems that people with CF commonly experience (but milder) because of the two polymorphisms M470V (one inherited from me, the other from her father) Like chronic sinusitis and respiratory problems.
As for climates: I live in East Texas and we obviously still have problems, but the cold weather really seems to affect her asthma, and Texas really doesn't have that cold of weather compared to the northern states.
If you happen to live in Nebraska, I can attest that they have an outstanding CF/Asthma specialist, Dr. Bettina Hilman. Karly was BAD< BAD until we found her and she started testing and trying to find out what was going on.
And your right about alot of doctor's not knowing about M470V, they don't. I know more about it than most of Karly's doctors. Fortunately Dr. Hilman had a degree in Genetics so she knew what to look for. I understand the research on M470V is limited. There is a doctor at John Hopkins university that has studied it, you might find it interesting to email him about your son.
Believe it or not, he's liable to answer you. He did me. Basically, he told me there was alot more studies that needed to be done, but if you ask, he might can guide you in the right direction for your son. His name is Dr. Garry Cutting. It can't hurt.
Check in with us ever so often and let us know how you all are doing. And please feel free to ask any questions you like. It's nice to chat with people going thru the same things.