<div class="FTQUOTE"><begin quote><i>Originally posted by: <b>asiewny</b></i>
Could there still be a chance he has CF with no gene mutations?</end quote></div>
My son and I were both diagnosed with "atypical CF" based on borderline sweat tests and a long history of health problems. The blood test we had not identify our mutations. My insurance company turned down my doctor's request for a more comprehensive (more expensive) genetic test.
Here is what I think:
First, two people with the same known genetic mutations can have very different outcomes. So I don't think CF genes alone are the whole story. I think other genes one has, which may not currently be recognized as related to CF, also play a role. And I think environment and lifestyle play a big role.
Second, the list of mutations has grown over the years. So not having any of the currently known mutations doesn't seem like a definite "no CF" diagnosis to me. Also, I would wonder how comprehensive the genetic test was. Some people don't find out what their mutations are until they have a more comprehensive exam.
Third, my son had not been on antibiotics for over 3 years before he was diagnosed. He was at a clinic where he saw different doctors every time he went whereas I was a clinic where I saw the same doctor every time. Any time someone new saw my son, they consistently asked "Are you sure he has CF?" I have also had people try to tell me my diagnosis can't be correct because I'm too healthy. But getting diagnosed with CF is why I have been able to get well, so I don't think the diagnosis is wrong. Incorrect diagnoses usually lead to more frustration, not dramatic improvements in health. So it is clear to me that most people currently define CF in their minds as "someone who is very ill in a certain way" rather than "someone with certain types of traits which makes them vulnerable to certain types of illness". As long as people think CF = "you must be really, really sick", then we have a serious obstacle to genuinely getting people well. I see CF as "having certain traits, which make me prone to getting sick" and that has given me a great deal of power to get healthier.
I guess the answer to your question depends in part on what definition you (and the doctors) are using. And I don't really care much about labels. I care whether those labels lead to useful information, better health care from doctors, and better ability to take care of myself and my children. An accurate diagnosis can be a wonderful thing. But, really, I would probably never have gotten so sick if doctors had just taken me seriously all those years before my diagnosis when I would go to the ER and say "If you give me that wimpy dose of wimpy antibiotics, I will be back again in a week or two". If you have a good doctor who really listens to you and communicates well with you and takes your concerns and issues seriously, that's probably more important than what they decide to call it.
Good luck with this.