Cystic fibrosis

Some people are born with a body problem.

Their bodies make mucus that is very thick. This thick mucus can get stuck in many places. It can clog the lungs and make breathing hard. It can also clog the parts that help digest food. This can make it hard for kids to grow. Their sweat can also taste very salty.

Doctors use tests to find this problem. They use medicine to help people feel better.

Cystic fibrosis is a rare health problem. It is a genetic disorder. This means people are born with it.

It happens when a person gets two faulty copies of a gene. This gene makes a protein called CFTR. This protein acts like a tiny gate. It helps move salt and water in and out of cells.

When the CFTR protein does not work, things change. The body makes mucus that is very thick and sticky. This thick mucus can clog many parts of the body. It often clogs the lungs. This makes it hard to breathe. It also leads to lung infections from bacteria.

The thick mucus can also clog the pancreas. The pancreas helps the body digest food. If it is blocked, people may have trouble growing. They may also have trouble absorbing vitamins. Some people with this condition have very salty sweat. Doctors can find the problem with a sweat test. There is no cure yet. Doctors use medicine to help people stay healthy.

Cystic fibrosis is a rare genetic disorder that affects many parts of the body.

It is inherited in an autosomal recessive way. This means a person must get two faulty copies of a gene to have the condition. One copy comes from each parent. People with only one working copy are called carriers. They are mostly healthy but can pass the gene to their children. This condition causes the body to make thick, sticky mucus. This mucus can clog the lungs, pancreas, liver, kidneys, and intestines.

To understand how it works, we must look at a protein called CFTR. This protein acts like a tiny gate in our cells. It helps move salt and water in and out of the body.

When the CFTR protein does not work, the balance of salt and water changes. Instead of being thin and slippery, the body's fluids become very thick. In the lungs, this thick mucus makes it hard to breathe. It also traps bacteria like Pseudomonas aeruginosa and Staphylococcus aureus. These germs can cause frequent and serious lung infections.

Doctors have studied this condition for a long time. Descriptions of the symptoms go back as far as 1595. However, Dorothy Andersen first recognized it as a specific disease in 1938.

Today, doctors use several ways to find it. They can use a sweat test to check for high salt levels. They also use genetic testing to look at the CFTR gene. Some places even screen infants right at birth. This helps families get help very early.

There are many important facts about who is affected by this disorder. It is most common in people of Northern European ancestry. In that group, about 1 in 3,000 newborns has cystic fibrosis. Around 1 in 25 people in that group is a carrier. It is much less common in Africa and Asia. While there is no cure, treatments are getting better. In the US, UK, and Canada, the median survival age has risen to about 65 years. This is a big change from older estimates of 40 to 50 years.

Living with cystic fibrosis means managing many different body systems. The thick mucus in the pancreas can make it hard to digest food. This can lead to poor growth or trouble absorbing vitamins like A, D, E, and K. Some people may also develop diabetes because of damage to the pancreas. Because the mucus affects the lungs, many people use medicine to help them breathe. They might use inhalers or take antibiotics to fight infections. Doctors may even suggest a lung transplant if the lungs become too weak.

Cystic fibrosis (CF) is a rare and serious genetic disorder.

It primarily affects the lungs and the digestive system. However, it can also impact the liver, kidneys, and intestines. The hallmark of this condition is the accumulation of thick, sticky mucus in various organs. This mucus can block tubes and passages throughout the body. This blockage leads to many different health challenges. Understanding CF requires looking at how our cells manage salt and water.

At the center of this disorder is the CFTR protein. This stands for cystic fibrosis transmembrane conductance regulator.

In a healthy body, this protein acts as a channel in cell membranes. It helps move chloride, a component of salt, out of the cells. This movement of salt helps draw water out to keep mucus thin and slippery. In people with CF, mutations in the CFTR gene cause the protein to malfunction.

When the protein does not work, chloride and water do not move correctly. As a result, secretions that should be thin become thick and sticky. This change in consistency is what causes the primary symptoms of the disease.

The respiratory system is often the most severely affected area. Thick mucus clogs the airways and makes breathing difficult. This mucus also makes it hard for the lungs to clear out germs. Bacteria like Pseudomonas aeruginosa and Staphylococcus aureus can settle in the lungs.

These infections cause inflammation and can lead to permanent lung damage. Over time, patients may develop bronchiectasis, which is damage to the large airways. In severe cases, people may experience wheezing, coughing up blood, or even respiratory failure. Some patients may eventually require a lung transplant to survive.

Digestive issues are also very common in those with CF. The thick mucus can block the ducts in the pancreas. The pancreas is responsible for sending digestive enzymes into the duodenum, part of the small intestine. When these enzymes are blocked, the body cannot break down food properly.

This leads to malabsorption, where the body fails to take in nutrients. Many patients suffer from poor growth or fatty stools. They may also struggle to absorb fat-soluble vitamins like A, D, E, and K. In some cases, damage to the pancreas can lead to cystic fibrosis-related diabetes.

The liver can also be impacted by these thick secretions. Bile is a fluid produced by the liver to help with digestion. If the bile ducts become blocked, it can cause liver damage or scarring, known as cirrhosis. This is the third most common cause of death related to CF. Some people also experience issues with their intestines. For example, about 15% to 20% of newborns with CF experience meconium ileus, which is a blockage in the small intestine. Others may deal with constipation or more serious intestinal obstructions.

Medical history shows that we have understood CF for a long time. Descriptions of the condition exist as far back as 1595. However, it was first recognized as a specific disease in 1938 by Dorothy Andersen.

Today, doctors use specific tools to diagnose the condition. They use sweat tests to measure sodium concentrations, as CF sweat is abnormally salty. They also use genetic testing to find mutations in the CFTR gene. In many parts of the world, infants are screened for CF right at birth.

Statistics show how the disease varies across different populations. CF is most common in people of Northern European ancestry. In this group, about 1 in 3,000 newborns is affected. Around 1 in 25 people in this group are carriers of the gene. It is much less common in people from Africa or Asia. While there is currently no cure, medical treatments have improved significantly. In the past, the median survival age was around 40.7 years. However, recent improvements mean the estimated median survival age is now approximately 65 years in the US, UK, and Canada.