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How Common Are False Positives With Cystic Fibrosis Tests
Cystic fibrosis is a genetic disorder involving lungs & digestive tract, causing recurrent lung infections due to thick inspissated mucus & poor growth in majority of patients due to malabsorption. Treatment involves inhaled respiratory therapies to prevent lung disease & pancreatic enzymes to enable absorption of nutrients. Average life expectancy is near 40 years, ...Read more
Not Typical: Certain rare conditions can also lead to high sweat chloride levels (the gold standard test for cystic fibrosis). However, these rare conditions (there's a list) will cause the patient to exhibit different symptoms than those consistent with cystic fibrosis, so the sweat chloride test is considered to be reliable in diagnosing CF in conjunction with the patient's history and physical exam. ...Read moreSee 1 more doctor answer
As high as 15%: The sweat chloride test is still the gold standard diagnostic test for cystic fibrosis. The accuracy of this test is highly dependent on the method used and the lab it is performed in. I only trust a result that is performed in a center that is certified by the cystic fibrosis foundation. Some reasons for false positives include: lab error, malnutrition, & eczema. ...Read more
Can you tell me what heterozygous 57 have to do with the chances of being cystic fibrosis positive?
Cystic fibrosis: This is a start. http://www.cff.org/AboutCF/Testing/Genetics/GeneticCarrierTest/ also your ObGyn and/or a genetics specialist can help explain. ...Read more
Yes, Gold Standard: The gold standard for a diagnosis of CF is 2 back-to-back sweat chloride tests. However, the ability to run genetic tests and detect the disease in this fashion is becoming more common. In fact, it is now standard procedure in all 50 states for newborn babies to be screened, via blood from a heel prick, for cystic fibrosis. ...Read moreSee 2 more doctor answers
My husband 82 yr old grandpa was diagnosis w cystic fibrosis. Should i get my kids tested one is 2 1/2 and 5 1/2 or never had any genetic tests done?
Doubt your Dx: There is a rare but different disease called fibrocystic disease of the lung.It has nothing at all to do with cystic fibrosis, which is evident in most kids in their first year.For one to live to 82 with the disease would likely be a world record. ...Read moreSee 1 more doctor answer
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