Cystic Fibrosis

What is Cystic Fibrosis?

Cystic fibrosis is a genetic condition that affects the lungs and digestive system. It causes the body to produce thick and sticky mucus that can clog airways and block ducts in organs. This mucus buildup makes it hard to breathe and digest food properly.

The condition is caused by mutations in the CFTR gene, which controls salt and water movement in cells. When this gene does not work correctly, mucus becomes much thicker than normal. Over time, this thick mucus can damage the lungs and prevent digestive enzymes from reaching the intestines.

Cystic fibrosis is a lifelong condition that requires ongoing care and monitoring. People with this condition often need help managing lung infections, digestive problems, and nutritional deficiencies. Early detection and consistent treatment can help people with cystic fibrosis live longer and healthier lives.

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Symptoms

Persistent coughing with thick mucus
Frequent lung infections or pneumonia
Wheezing or shortness of breath
Poor weight gain despite good appetite
Greasy or bulky stools that are hard to flush
Chronic sinus infections
Salty-tasting skin
Difficulty breathing during physical activity
Frequent diarrhea or constipation
Nasal polyps or stuffy nose

Symptoms can vary widely from person to person. Some people experience severe lung and digestive problems early in life. Others may have milder symptoms that develop more slowly over time.

Causes and risk factors

Cystic fibrosis is caused by mutations in the CFTR gene, which is inherited from both parents. A person must receive one faulty gene copy from each parent to develop the condition. People who carry only one faulty gene copy are carriers but do not have symptoms themselves.

This is not a lifestyle-related condition but rather a genetic one present from birth. Risk factors include having family members with cystic fibrosis or being a carrier of the CFTR gene mutation. Certain ethnic groups have higher carrier rates, including people of Northern European descent. Genetic counseling can help families understand their risk and make informed decisions about testing.

How it's diagnosed

Cystic fibrosis is typically diagnosed through a sweat chloride test, which measures salt levels in sweat. Higher than normal chloride levels suggest cystic fibrosis. Genetic testing can confirm the diagnosis by identifying mutations in the CFTR gene. Newborn screening programs now test for cystic fibrosis in most states.

Blood tests play an important role in monitoring the condition once diagnosed. Tests for chloride, lipase, vitamin A, vitamin K, and other markers help track how well the digestive system is working. Rite Aid offers add-on tests that measure these key biomarkers. Regular monitoring helps doctors adjust treatment plans and catch problems early.

Treatment options

Airway clearance techniques to help remove mucus from lungs
Inhaled medications to open airways and thin mucus
Pancreatic enzyme supplements to aid digestion
High-calorie, high-fat diet to maintain healthy weight
Fat-soluble vitamin supplements, especially vitamins A, D, E, and K
Antibiotics to treat and prevent lung infections
CFTR modulator drugs that target the underlying genetic defect
Regular exercise to improve lung function and overall health
Pulmonary rehabilitation programs
Regular monitoring with pulmonary and gastroenterology specialists

Frequently asked questions

Cystic fibrosis is a genetic condition that causes thick mucus to build up in the lungs and digestive system. It only develops when a person inherits a faulty CFTR gene from both parents. About 30,000 people in the United States live with this condition. It is most common among people of Northern European descent.

Early signs often include salty-tasting skin, poor weight gain, and frequent respiratory infections. Infants may have trouble passing their first stool or experience persistent coughing. Many cases are now detected through newborn screening before symptoms appear. Early detection allows treatment to start sooner, which can improve long-term outcomes.

Blood tests cannot diagnose cystic fibrosis, but they help monitor the condition once diagnosed. Tests measuring chloride, lipase, and fat-soluble vitamins show how well the pancreas and digestive system are working. The sweat chloride test remains the primary diagnostic tool. Genetic testing confirms the diagnosis by identifying CFTR gene mutations.

Thick mucus blocks the ducts in the pancreas, preventing digestive enzymes from reaching the intestines. This makes it hard to break down and absorb fats and nutrients from food. People with cystic fibrosis often need pancreatic enzyme supplements with every meal. Without these enzymes, they may experience greasy stools and poor weight gain.

Most people with cystic fibrosis need blood tests every three to six months to monitor nutritional status. Tests check levels of vitamins A, D, E, and K, along with markers of pancreatic function like lipase. More frequent testing may be needed if symptoms change or new treatments begin. Your care team will recommend a testing schedule based on your individual needs.

Cystic fibrosis is not currently curable, but treatment has improved dramatically in recent years. New CFTR modulator drugs can address the underlying genetic defect in many patients. These medications help the faulty protein work better, which reduces mucus buildup. With proper care, many people with cystic fibrosis now live into their 40s, 50s, and beyond.

The thick mucus blocks digestive enzymes, making it hard to absorb fat-soluble vitamins like A, D, E, and K. Low levels of these vitamins can cause vision problems, weak bones, and bleeding issues. Most people with cystic fibrosis take daily vitamin supplements in higher doses than the general population. Regular blood tests help ensure vitamin levels stay in a healthy range.

Yes, exercise is highly recommended for people with cystic fibrosis. Physical activity helps clear mucus from the lungs and improves overall fitness. Many people with cystic fibrosis participate in running, swimming, cycling, and other activities. Talk with your care team about creating a safe and effective exercise plan.

Lipase is a digestive enzyme made by the pancreas that helps break down fats. In cystic fibrosis, mucus blocks the pancreatic ducts, so lipase cannot reach the intestines properly. Blood lipase levels may be low, while urine levels may be high. This test helps doctors understand how well the pancreas is functioning and whether enzyme supplements are needed.

Yes, carrier testing is available through genetic testing and is recommended for people with a family history of cystic fibrosis. Carriers have one normal gene and one faulty gene, so they do not develop the condition. If both parents are carriers, each child has a 25 percent chance of having cystic fibrosis. Genetic counseling can help families understand their risks and options.