That is really crazy that he has 3 mutations. Maybe that could make it different. Hope so for his sake! <img src="i/expressions/face-icon-small-blush.gif" border="0">)
If the mother has 2 mutations, then she has CF, regardless of symptoms. My cousin is 33 and did not get diagnosed til 30 and only due to the fact he was infertile. Just cus she doesn't have symptoms, doesn't mean she doesn't have it. 2 mutations in one person = CF.
Sorry, I am no help on info on each mutation though.
If the mother has 2 mutations, then she has CF, regardless of symptoms. My cousin is 33 and did not get diagnosed til 30 and only due to the fact he was infertile. Just cus she doesn't have symptoms, doesn't mean she doesn't have it. 2 mutations in one person = CF.
Sorry, I am no help on info on each mutation though.