Our son is in the process of being tested for Cystic Fibrosis, we had one sweat test come back borderline, and will have another one done next week, along with blood work. The doctors are not even using the term "to rule out " anymore. They say that with all of his symptoms collectivly it will most likley come back that he does have it. I say "but we had only a borderline test, don't those usually come back to be negitive?" But they say that since it was not done at a "Cystic Fibrosis clinic" the results may not be very accurate. What is the difference? Am I grasping at straws here? They are also testing him for Celiac disease, I can't find much information about that. Is it sometimes similar to Cystic Fibrosis? Just a few more questions, he has this huge tummy, so big that sometimes I can't dress him in his normal clothes it seems. I have not read anything about this in anything about Cystic Fibrosis, is this a common problem with Cystic Fibrosis? Also does any one know anything about Celiac disease, does it also effect the lungs and digestive system? Last question does anyone know what does "severe perihilar, peribronchial cuffing" means? I saw this written about her lung x-ray and I also overheard the doctor tell the other doctor and they don't tell me everything, I know they don't, and at this point I have gone way past paranoid. It's probally just nothing, and I am probally over reacting. Sorry to be so long with so many questions. Hope anybody can help. By the way this seems to be a really helpful sight.