Cystic Fibrosis Diagnosis

How will your doctor diagnose you with this condition? Learn about the tests, exams, processes, and other information relating to the diagnosis of Cystic Fibrosis below.

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How to Diagnose Cystic Fibrosis


The doctor will ask about symptoms and medical history. A physical exam will be done. CF is suspected in a child with classic symptoms, especially if a sibling has CF.

Tests may include:

  • Sweat chloride testing (still the standard for making a diagnosis of CF)
  • DNA testing
  • Nasal potential difference measurement
  • Chest and/or sinus x-rays
  • Tests of pancreatic function
  • Lung function tests
  • Newborn screening


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Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition. Copyright ©2013 EBSCO Publishing All rights reserved. Source: EBSCO