Understanding Choanal Atresia: Causes and Treatments

Written by Medicover Team and Medically Reviewed by Dr Neha Mukhi , Pediatricians

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1. Causes 2. Find a Doctor 3. Diagnosis 4. Treatment 5. FAQs

Choanal atresia is a rare congenital condition in which one or both of the nasal passages are blocked by bone or soft tissue. It is present at birth and can interfere with normal breathing, especially in newborns who primarily breathe through their noses. Babies with bilateral choanal atresia may develop severe breathing difficulties soon after birth, while unilateral cases may cause mild or delayed symptoms.

Common signs include nasal obstruction, noisy breathing, difficulty feeding, and persistent nasal discharge. The condition is diagnosed through physical examination, nasal endoscopy, and imaging tests such as CT scans. Early diagnosis and appropriate surgical treatment can restore normal breathing and improve long-term outcomes.

What are the Types of Choanal Atresia?

There are two main types of choanal atresia:

Unilateral Choanal Atresia: One side of the nasal passage is blocked. This form is often diagnosed later in childhood because symptoms may be less severe.
Bilateral Choanal Atresia: Both sides of the nasal passage are blocked. This form is usually diagnosed at birth due to immediate breathing difficulties.

What are the Causes of Choanal Atresia?

The exact causes of choanal atresia are not well understood, but it is believed to occur due to abnormal development during fetal growth. Some potential factors include:

Genetic Mutations: Some cases are associated with genetic mutations, which can disrupt normal nasal passage development.
Environmental Factors: Exposure to certain environmental factors during pregnancy may increase the risk, although this is not well documented.

Associated Congenital Conditions

Choanal atresia often occurs alongside other congenital conditions, such as:

CHARGE Syndrome: A disorder that affects multiple body systems, including the heart, ears, and eyes.
Treacher Collins Syndrome: A condition that affects the development of bones and tissues in the face.

What are the Symptoms of Choanal Atresia?

Symptoms of choanal atresia can vary depending on whether the blockage is unilateral or bilateral. Common symptoms include:

Difficulty Breathing: Infants with bilateral choanal atresia may have severe breathing difficulties immediately after birth, often becoming cyanotic (blue) when feeding.
Nasal Discharge: Persistent nasal discharge may be present, particularly in unilateral cases.
Snoring or Noisy Breathing: Infants may exhibit noisy breathing or snoring sounds.
Feeding Difficulties: Difficulty feeding is common due to the inability to breathe through the nose while nursing.

When to See a Doctor for Choanal Atresia?

If your baby or child shows signs of choanal atresia, seek immediate medical attention from a Pediatrician. Early diagnosis and treatment are essential to restore normal breathing, prevent complications, and support healthy growth and development.

If your newborn has difficulty breathing, especially during feeding or while resting.
If your baby has persistent nasal blockage, noisy breathing, or bluish skin (cyanosis).
If your child has difficulty feeding, choking episodes, or poor weight gain.
If there is persistent nasal discharge or blockage affecting one or both nostrils.
If breathing improves while crying but worsens when the mouth is closed.
If your child experiences frequent respiratory infections or ongoing breathing problems.
If choanal atresia is suspected during a newborn examination or prenatal imaging.
If symptoms persist or worsen, consult a Pediatrician promptly for further evaluation and referral to an ENT specialist if needed.

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How is Choanal Atresia Diagnosed?

Early diagnosis is crucial for managing choanal atresia effectively. Several methods are used to diagnose this condition.

Physical Examination

A physical examination by a pediatrician can often identify signs of choanal atresia. Inserting a small catheter into the nasal passage can help determine if there is a blockage.

Imaging Studies for Choanal Atresia

Imaging studies are essential for confirming the diagnosis and determining the extent of the blockage. Common imaging techniques include:

CT Scan (Computed Tomography): Provides detailed images of the nasal passages and helps identify the type and location of the blockage.
MRI (Magnetic Resonance Imaging): Used in some cases to provide additional detail.

What are the Surgical Treatment Options for Choanal Atresia?

Surgery is the primary treatment for choanal atresia. The specific surgical approach depends on the severity and type of blockage. Common surgical options include:

Transnasal Endoscopic Surgery

This minimally invasive procedure involves using an endoscope to remove the blockage through the nasal passages. It is often preferred because of its shorter recovery time and lower risk of complications.

Transpalatal Surgery

In more severe cases, a transpalatal approach may be necessary. This involves making an incision in the palate to access and remove the blockage. Recovery time is longer, and the procedure carries a higher risk of complications.

Post-Surgical Care

Post-surgical care is crucial for ensuring a successful outcome. This includes:

Regular Follow-Up: Regular follow-up appointments with the surgeon to monitor healing and check for complications.
Nasal Stents: In some cases, nasal stents may be used to keep the nasal passages open during the healing process.
Antibiotics: Antibiotics may be prescribed to prevent infection.

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What is the Prognosis for Infants with Choanal Atresia?

The prognosis for infants with choanal atresia varies depending on the severity of the condition and the presence of associated congenital anomalies. With timely diagnosis and appropriate treatment, most children have a positive outcome and lead healthy, normal lives.

Long-Term Considerations

Some children may require ongoing monitoring after treatment. Potential long-term considerations include:

Re-Stenosis: There is a risk of the nasal passages becoming blocked again, requiring additional surgical intervention.
Speech and Feeding Issues: Some children may experience speech and feeding difficulties, particularly if the condition is associated with other congenital anomalies.

Frequently Asked Questions

1. What causes choanal atresia?

Choanal atresia is a congenital condition where the nasal passages are blocked by bone or tissue, making it difficult for newborns to breathe through their nose.

2. What are the symptoms of choanal atresia?

Symptoms in infants include difficulty breathing, cyanosis (blue skin) during feeding, and noisy breathing. In bilateral cases, immediate medical intervention is required.

3. How is choanal atresia diagnosed?

Diagnosis is made through nasal endoscopy, imaging studies such as CT scans, or MRI to confirm the blockage and assess the severity of the condition.

4. What are the surgical treatment options for choanal atresia?

Surgery is the primary treatment, involving the removal of the obstruction and opening of the nasal passage. Early intervention is crucial to ensure normal breathing.

5. What are the associated conditions with choanal atresia?

Choanal atresia can be associated with other congenital conditions such as CHARGE syndrome, heart defects, or hearing loss, requiring a multidisciplinary approach to treatment.