Thank you all for your replies! I appreciate your input. I have looked into some of the other disorders that could cause a borderline sweat test and he just doesn't fit the bill for the other disorders. I can rule out most of those other disorders. The only one's that I am unsure about are the loooong named disorders that I can't pronounce. He had his genetic test on Saturday morning and they said the results would be back by the end of the week. I will keep you all posted. Thanks for your help!