A tracheoesophageal fistula (TEF) is an abnormal connection between the trachea (windpipe) and the esophagus (the tube that carries food to the stomach). These two structures run side by side in the chest but are normally completely separate. When a fistula forms between them, food and liquids can enter the airway, and air can pass into the digestive tract, causing serious breathing and feeding problems.
Most TEFs are congenital, meaning babies are born with them. But adults can develop them too, usually as a complication of prolonged time on a breathing machine, cancer, or trauma. Whether it appears at birth or later in life, a TEF almost always requires treatment to close the connection.
How a TEF Disrupts Breathing and Eating
The trachea and esophagus develop from the same embryonic tissue early in pregnancy. Around the fourth and fifth weeks of development, a wall of tissue normally forms to divide them into two separate tubes. When that separation is incomplete, a fistula remains, sometimes alongside a condition called esophageal atresia, where the esophagus ends in a blind pouch instead of connecting to the stomach.
The practical result is that the barrier between the airway and the digestive tract is broken. Saliva, milk, or food can leak through the fistula into the lungs, a process called aspiration. This leads to coughing, choking, and potentially pneumonia. At the same time, air can travel into the stomach and intestines, causing bloating. The severity depends on the size and location of the opening.
Types of TEF
TEFs are classified into several types based on the anatomy of the connection and whether esophageal atresia is also present. The most common form, accounting for roughly 85% of cases, involves a blind-ended upper esophagus with a fistula connecting the lower esophagus to the trachea. In this type, a newborn cannot swallow at all because the esophagus doesn’t reach the stomach, and whatever the lower segment produces drains into the airway.
The so-called H-type fistula is less common but important to know about. In this type, the esophagus is fully intact and connected to the stomach normally, but a small passage links it to the trachea somewhere along its length. Because the esophagus works, babies with an H-type fistula can often feed, and the only clue may be coughing or choking during meals or repeated lung infections. This type can go undiagnosed for months or even years. In one case series, diagnosis was delayed anywhere from 26 days to 4 years, and rare cases have not been caught until adulthood.
Congenital Causes
In most newborns, a TEF occurs sporadically with no clear single genetic cause. The defect arises during early fetal development when the trachea and esophagus fail to separate properly, though researchers haven’t pinpointed exactly why this happens in most cases. It’s likely a mix of genetic susceptibility and environmental factors during pregnancy.
About half of babies born with a TEF also have other birth defects. One well-recognized pattern is called VACTERL association, which occurs in roughly 1 in 10,000 to 40,000 newborns. VACTERL is an acronym for a cluster of abnormalities that can appear together: vertebral (spine) defects, anal atresia, cardiac defects, tracheoesophageal fistula, renal (kidney) anomalies, and limb abnormalities. A child is diagnosed with VACTERL association when at least three of these features are present. Among people with VACTERL, 50 to 80% have a TEF, 40 to 80% have heart defects, and 50 to 80% have kidney problems. Most cases are sporadic, with no family history of the condition.
Acquired Causes in Adults
Adults can develop a TEF that wasn’t present at birth. Malignancy is the leading cause, responsible for more than 50% of acquired cases. Esophageal cancer or lung cancer can erode through the wall between the trachea and esophagus, creating a new opening. Prolonged intubation is the next most common cause. When a breathing tube presses against the back wall of the trachea for an extended period, the tissue can break down and create a fistula into the esophagus behind it.
Other causes include radiation therapy to the chest, prior surgery in the area, trauma, and chronic infections such as tuberculosis, though these are less common.
Symptoms in Newborns vs. Adults
In newborns with esophageal atresia and a TEF, symptoms appear within hours of birth. The baby drools excessively, chokes on saliva, and cannot feed. Attempts to pass a feeding tube into the stomach fail because the tube hits the blind-ending esophagus. Breathing may be labored, and the skin can take on a bluish tint from low oxygen, especially during feeding attempts.
Babies with an isolated H-type fistula present more subtly. They may cough or choke during feeds but otherwise seem relatively well. Over time, repeated small aspirations can lead to recurrent pneumonia or chronic respiratory symptoms that prompt further investigation.
Adults with an acquired TEF typically notice sudden, severe coughing when swallowing liquids. Recurrent lung infections, weight loss, and difficulty eating are common. In cancer patients, a new onset of coughing with swallowing is a red flag that the tumor may have created a fistula.
How a TEF Is Diagnosed
In newborns, the first clue often comes when a nurse cannot pass a feeding tube into the stomach. An X-ray may show the tube coiled in a blind-ending esophageal pouch, and air in the stomach suggests a fistula is letting air through from the trachea. A contrast swallow study, where the baby swallows a small amount of dye that shows up on X-ray, can outline the anatomy of the connection.
H-type fistulas are harder to detect because the esophagus looks normal on a standard swallow study. The fistula opening can be tiny. In these cases, a scope passed through the airway (bronchoscopy) or down the esophagus (endoscopy) may be needed to find the opening directly. Sometimes a contrast study must be done in a specific position, with the baby prone, to get dye to enter the small fistula tract.
In adults, a combination of CT imaging, contrast swallowing studies, and endoscopy is typically used. The underlying cause, whether cancer, intubation injury, or infection, shapes the diagnostic approach.
Treatment and Surgical Repair
Congenital TEFs are treated surgically, usually within the first days of life. The operation involves dividing the fistula to separate the trachea from the esophagus and, if esophageal atresia is present, reconnecting the two ends of the esophagus so it forms a complete tube to the stomach. This is most commonly performed through a small incision in the right side of the chest, though minimally invasive approaches using a tiny camera (thoracoscopy) are increasingly used at specialized centers.
For acquired TEFs in adults, the treatment landscape is broader. Interventional approaches using bronchoscopy or endoscopy are now the primary option for many patients, particularly those with cancer-related fistulas. These procedures can involve placing a covered stent, a small mesh tube, inside the esophagus or airway to seal the opening without major surgery. This approach alleviates symptoms and can improve quality of life even when the underlying disease cannot be cured.
Open surgery for acquired TEFs in adults is performed less commonly because of the complexity and risk involved. When it is done, techniques include closing the fistula and reinforcing the repair with a flap of muscle tissue or other tissue to prevent it from reopening. Supportive measures like feeding tubes placed directly into the stomach or small intestine help maintain nutrition while the area heals.
Recovery After Congenital TEF Repair
After surgery, babies are kept on intravenous nutrition and are not fed by mouth initially. Around five to seven days after the operation, a contrast swallow study checks whether the connection between the two ends of the esophagus has healed without any leaks. If that study looks good, oral feeding can begin, with breast milk preferred when available.
Surgeons generally prefer to start oral feeds without a feeding tube in place, since a tube sitting across the delicate new connection could cause narrowing. If the baby isn’t taking enough by mouth after a reasonable trial of several days, a feeding tube can be placed under X-ray guidance to ensure safe positioning. A chest drainage tube placed during surgery is typically removed once the baby tolerates oral feeds for 24 hours without signs of leaking.
Recovery timelines vary. Some babies feed well within a week or two. Others, especially those who were premature or have other medical conditions, may need feeding support for longer.
Long-Term Complications
Even after a successful repair, children born with a TEF often face ongoing issues that can persist into adulthood. The most common long-term complication is narrowing (stricture) at the site where the esophagus was reconnected. Scar tissue forms as the repair heals, and if it tightens enough, food can get stuck. This is more common after thoracoscopic repairs than open surgery. Strictures are typically treated by gently stretching the narrowed area with a balloon or dilator during endoscopy, sometimes requiring multiple sessions.
Gastroesophageal reflux is another frequent issue. The repaired esophagus may not move food downward as efficiently as a normal one, and the angle where the esophagus meets the stomach can be altered by the surgery. Reflux can worsen stricture formation and cause discomfort, so it’s often managed proactively.
Tracheomalacia, a condition where the trachea is softer and floppier than normal near the site of the original fistula, affects a significant number of children after repair. It can cause a barking cough, noisy breathing, or difficulty clearing respiratory infections. Most children outgrow it as the cartilage in the airway stiffens with age, though severe cases occasionally need intervention.
Recurrence of the fistula itself is uncommon but possible. Difficulty swallowing, recurrent pneumonia, and chronic cough in a child with a history of TEF repair should prompt evaluation for a recurrent fistula or stricture.
Survival and Outlook
The prognosis for congenital TEF has improved dramatically over the past several decades. Survival rates now exceed 95% for babies with an isolated TEF or esophageal atresia. The biggest factors that lower survival are low birth weight and the presence of major associated anomalies, particularly heart defects. In one large registry study, 90.6% of babies who did not survive had associated anomalies, compared to about 60% of survivors.
For adults with cancer-related TEFs, the outlook depends heavily on the underlying malignancy. Stenting and supportive care can significantly improve comfort and the ability to eat, but the fistula is often a sign of advanced disease. Adults with TEFs caused by intubation injury or other non-cancerous causes generally have better long-term outcomes once the fistula is successfully closed.