Thanks for the replies. She has had 3 sweat tests w/ mixed results, so that's why we had the 4th done yesterday. No results yet? She had a confirmed mutation when she had the 25 study done, 1898+1G A showed up, we don't know what the 85 study will show?? I'm very interested in getting that 900 study done, you said it was free?? HOw do we get it?? Can you provide the info? ThanksShe also has GERD, sinus issues and her blood tests for allergy's showed her immunoglobulin igE (E) as very high, she tested negative on all other immunoglob tests and NEGATIVE for cats/dogs/ trrees/grasses/foodweeds..we haven't met w/ the doc yet but he suspected a type of asthma (lung involvement)....so that's why he ordered the allergy blood tests. Anybody know about immunoglobulin E results??? I can't find much online about it.Can you have CF and asthma?? The doc ordered a sleep study, another video EEG (1 day) and her FEV were ok, although a little low...we didn't get much info about that. I guess they'll redo it later. The doc said, even when all these tests are done he may NOT be able to get firm answers now, it may take years. Thanks for your support.