Choanal atresia is a congenital blockage of the back of the nasal passages that can affect one or both sides. Babies with choanal atresia may have noisy breathing, feeding trouble, or bluish color that improves when they cry, and doctors describe this as a breathing obstruction. Bilateral choanal atresia is an emergency in newborns and needs prompt airway support and surgery, while one-sided blockage may be found later because of long‑standing nasal congestion. Most children do well after surgery and follow-up care, and mortality is low with timely treatment. Not everyone will have the same experience, and early symptoms of choanal atresia can vary based on whether one or both sides are blocked.
Overview
Choanal atresiaSymptoms
Choanal atresia features depend on one or both nasal passages being blocked. Newborns with both sides blocked can have noisy breathing, blue spells that improve when crying, and trouble feeding. One-sided blockage often causes persistent one‑nostril stuffiness and discharge.
Outlook and prognosis
Most babies with choanal atresia do well after surgery to open the blocked nasal passage, especially when treated early. Breathing and feeding usually improve, though some need repeat procedures or ongoing nasal care. Long-term growth and development are typically normal.
Causes and risk factors
Choanal atresia begins in early fetal development when the back of the nasal passage fails to open. Genetic changes—usually sporadic, sometimes linked to CHARGE (CHD7)—raise risk; family history is uncommon. First‑trimester methimazole/carbimazole exposure may increase risk; no lifestyle causes.
Genetic influences
Genetics plays a role in choanal atresia, especially when it appears with syndromes like CHARGE. Many cases are isolated with no clear inheritance. Variations can raise risk, but most families have low recurrence; a genetics consult can clarify individual risk.
Diagnosis
Doctors suspect choanal atresia when a tube can’t pass through the nose and breathing improves when crying. Diagnosis of choanal atresia is confirmed with endoscopy and CT. Genetic tests may be offered, especially when features suggest a syndrome.
Treatment and drugs
Treatment for choanal atresia focuses on safely opening the blocked nasal passage and supporting breathing. Newborns often need temporary airway support, followed by endoscopic surgery to create or widen the opening; stents may be used briefly. Ongoing care can include nasal saline, suctioning, and monitoring for restenosis or feeding issues.
Symptoms
Breathing through the nose can be difficult when the back of the nasal passage is blocked from birth. The changes are often subtle at first, blending into daily life until they become more noticeable. Choanal atresia can affect one side or both, so signs range from a constant stuffy nose to urgent breathing and feeding problems right after birth.
Babies mostly breathe through their noses, so a blocked passage can cause distress, especially during feeds or sleep. If both sides are blocked, breathing can be hard within minutes of birth. This is a medical emergency.
When airflow is limited, a baby may look blue around the lips or face, especially while feeding or resting. Clinicians call this cyanosis, which means low oxygen in the blood. The coloring often eases when the baby cries because the mouth opens for airflow.
In bilateral blockage, crying opens the mouth and temporarily relieves the blockage. You may see calmer breathing and more color during a cry. This pattern is consistent with choanal atresia but can appear in other conditions too.
You might hear persistent snorting or noisy breathing through the nose. Sounds can be louder when lying on the back or during a cold. In one-sided cases, noise may be mild but ongoing.
How people usually first notice Choanal atresia?
Many families first notice choanal atresia when a newborn has noisy breathing, turns bluish while resting, and then quickly pinks up when crying, because newborns mostly breathe through the nose. In the hospital, nurses or doctors may suspect it if they can’t pass a small soft tube through one or both nostrils, or if bottle-feeding is difficult with choking or pauses to breathe. For some, prenatal ultrasound or MRI hints at the issue before birth, but most “first signs of choanal atresia” appear right after delivery, especially with complete blockage on both sides.
Types of Choanal atresia
Choanal atresia has a few well-recognized variants that change how and when symptoms show up. Some babies have one side blocked and breathe reasonably well, while both sides blocked can cause immediate trouble after birth. Doctors also describe whether the blockage is made of bone, soft tissue, or both, which can affect how it’s treated and how severe symptoms feel day to day. When people search for types of choanal atresia, these are the main variants they’ll see discussed.
Unilateral atresia
One nasal passage is blocked. Newborns may have noisy breathing on one side, persistent nasal discharge, or feeding difficulties that improve with mouth breathing. Diagnosis sometimes occurs later in infancy if symptoms are subtle.
Bilateral atresia
Both nasal passages are blocked. Newborns can have severe breathing distress that eases when crying and may struggle to feed until the airway is secured. This variant usually needs urgent treatment soon after birth.
Bony atresia
The blockage is mostly bone. Symptoms can be firmer and more fixed because bone does not flex, and surgery often involves removing thicker tissue. Recovery and nasal care plans may differ compared with softer blockages.
Membranous atresia
The blockage is mainly soft tissue. Breathing problems can still be significant, but the tissue may be thinner, which can influence surgical approach. Some children have fewer hard obstructions but still need careful follow-up.
Mixed atresia
The blockage includes both bone and soft tissue. Symptoms often reflect a combination—fixed blockage with some soft-tissue crowding. Surgical planning typically accounts for both components to open the nasal passage effectively.
What genetics can tell you about symptoms
Some people with CHD7 gene changes (often seen in CHARGE syndrome) develop choanal atresia plus ear, eye, heart, or growth differences because CHD7 helps guide early facial and airway formation. Others have isolated choanal atresia from smaller DNA changes near airway-development genes like RERE or FGF, mainly causing nasal blockage.
Causes and risk factors
Choanal atresia forms before birth when the back of the nasal passage does not open fully and bone or tissue blocks airflow. It can occur on its own or with genetic syndromes like CHARGE, and gene changes may be inherited or arise for the first time. Some risks are modifiable (things you can change), others are non-modifiable (things you can’t). Known risks include exposure to certain medicines in early pregnancy, such as retinoid acne drugs or some thyroid treatments, and it is reported a bit more often in girls. Because the blockage develops in the womb, early symptoms of choanal atresia often appear at birth or soon after.
Environmental and biological risk factors
Choanal atresia develops before birth. Doctors often group risks into internal (biological) and external (environmental). Knowing the early symptoms of choanal atresia can help with timely care, but here we focus on what may raise the chance it occurs. Below are environmental and biological elements linked to risk in research and clinical practice.
Babies assigned female at birth are affected more often than males. This pattern points to a biological difference during early facial development.
Exposure to methimazole or carbimazole in the first trimester has been linked to choanal atresia. Risk seems higher when these medicines are taken during the weeks when the nose and palate are forming.
Isotretinoin or high-dose vitamin A taken early in pregnancy has been associated with choanal atresia. The timing and dose matter, with greatest concern in the first trimester.
Many exposures have the strongest effect during the first 8–10 weeks, when facial structures develop. This sensitive window can amplify the impact of a harmful exposure on the condition.
Genetic risk factors
For many families, the key genetic questions are whether choanal atresia is part of a syndrome and what that means for relatives. Genetic factors can influence whether choanal atresia occurs by itself or alongside other birth differences. Some risk factors are inherited through our genes. Knowing the genetic context can help families recognize early symptoms of choanal atresia and plan care.
CHARGE syndrome: Choanal atresia is a hallmark feature in CHARGE syndrome, most often caused by changes in the CHD7 gene. If a parent carries a CHD7 change, it can pass in an autosomal dominant way, though many cases arise as a new change in the child.
Treacher Collins: Variants in TCOF1, POLR1D, or POLR1C can cause Treacher Collins syndrome, which can include narrowed or blocked nasal passages. This pattern is usually autosomal dominant with wide variation in features among relatives.
Craniosynostosis syndromes: Conditions like Crouzon or Apert, often tied to FGFR2 or FGFR3 changes, can include choanal atresia due to midface differences. Inheritance is typically autosomal dominant, sometimes from a new variant.
Chromosomal anomalies: Extra or missing chromosome pieces can disrupt midface development and occasionally cause blockage at the back of the nose. When other birth differences are present, chromosome testing such as a microarray may be considered.
Familial patterns: Most isolated cases happen as a one‑time event without a clear inherited cause. Rare families show autosomal dominant or recessive transmission, so the recurrence risk can vary.
Developmental pathways: Genes that guide neural crest and skull base development help shape the back of the nose and palate. Variants in these pathways can raise risk and may occur alongside other craniofacial differences.
Lifestyle risk factors
Choanal atresia is a congenital condition; lifestyle habits do not cause it, but they can influence symptoms, day‑to‑day breathing, feeding, and postoperative healing. Practical choices at home can reduce congestion, ease mouth‑breathing strain, and lower the chance of crusting or restenosis after repair. Below are examples of how lifestyle affects choanal atresia in infants, children, and adults.
Upright positioning and paced, smaller feeds can reduce breathlessness during feeding in infants who rely on mouth breathing. Thickened feeds or specialized bottles may help coordinate suck–swallow–breathe and limit aspiration risk.
Adequate fluid intake helps keep nasal secretions thin, lowering blockage risk in a narrowed or repaired choana. Using a cool‑mist humidifier can decrease crusting and nighttime obstruction.
Regular saline drops or rinses followed by gentle suctioning can clear crusts and improve airflow, especially after surgery. Consistent care may reduce synechiae and restenosis risk as tissues heal.
Saline and humidification before bedtime can limit overnight congestion and reduce mouth‑breathing discomfort. A calm, consistent routine may also lessen arousals caused by airflow resistance.
Risk prevention
Choanal atresia is present at birth, so preventing it entirely is rarely possible. Still, there are steps that may lower risks in pregnancy and steps that reduce complications if choanal atresia is suspected. Knowing your risks can guide which preventive steps matter most. Planning care early can also ensure safe delivery and immediate breathing support if needed.
If you or a close relative has CHARGE syndrome or a prior child with choanal atresia, genetic counseling can clarify recurrence risk. Counselors can discuss testing options in pregnancy and delivery planning.
Some antithyroid drugs used in early pregnancy (such as methimazole/carbimazole) have been linked with choanal atresia. If you take these, talk with your clinician before conception or early in pregnancy about safer timing or alternatives.
Avoid high‑risk pregnancy medicines like isotretinoin unless your specialist says they are essential. Use reliable contraception and follow recommended washout periods before trying to conceive.
A careful mid‑pregnancy anatomy scan can review facial and nasal structures and look for signs that raise concern for choanal atresia. If a syndrome is suspected, targeted ultrasound, fetal MRI, or genetic testing can help plan safe care. Screenings and check-ups are part of prevention too.
Transmission
Choanal atresia is not contagious; it cannot be transferred between people. It starts before birth, when the back of the nasal passages does not open properly.
Most cases happen sporadically, without a known inherited cause. Some occur as part of a genetic syndrome, such as CHARGE; in those families, the gene change is often new in the child, but if a parent carries it, it follows an autosomal dominant pattern and each child has a 50% chance to inherit it. Because how choanal atresia is inherited depends on whether it is isolated or part of a syndrome, genetic counseling can help clarify recurrence risk for future pregnancies.
When to test your genes
Choanal atresia is a congenital condition, so genetic testing is considered when it appears with other features suggesting a syndromic cause (like CHARGE), or there’s a family history. Test if a baby has bilateral atresia, multiple anomalies, or developmental concerns. Results can guide surveillance, surgeries, hearing/vision care, and family planning.
Diagnosis
In newborns, a blocked back of the nose can cause blue spells that ease when crying and make feeding hard. Doctors usually begin with a quick airway check and a careful look at the nose and mouth. The diagnosis of choanal atresia is confirmed with simple bedside tests and a close view of the nasal passages, followed by imaging if needed. Because it’s a congenital condition, teams also look for other features that might point to a related syndrome.
Breathing trouble that improves when crying, poor feeding, and noisy breathing raise concern right after birth. These early symptoms of choanal atresia often appear in the first hours of life. A careful head and neck exam helps distinguish it from common newborn congestion.
A soft catheter is gently passed through each nostril to see if the back of the nose is open. If it does not pass, choanal atresia is likely. A saline drop or small mirror under the nostrils can provide quick confirmation of blocked airflow.
A thin camera lets the team look directly at the nasal passages. This shows whether one or both sides are blocked and the exact location of the atresia. It also helps plan treatment by revealing tissue quality and space inside the nose.
A CT scan maps the bones and soft tissues of the nasal cavity and choanae. Imaging findings confirm the type of blockage (bony, membranous, or mixed) and guide surgical planning. It also shows the relationship to nearby structures for safer surgery.
Stages of Choanal atresia
Choanal atresia does not have defined progression stages. It’s a structural blockage present from birth, so it doesn’t typically progress; early symptoms of choanal atresia usually reflect whether one or both sides are blocked and how tight that blockage is. Doctors check breathing and nasal airflow, and may use a small camera in the nose or imaging such as a CT scan to confirm the diagnosis. Different tests may be suggested to help show the exact location and severity.
Outlook and prognosis
For many living with choanal atresia, the long-term outlook is shaped most by how early it’s recognized and how well the airway is stabilized in the first days to weeks of life. Early care can make a real difference, especially for newborns who breathe mainly through the nose. Once the airway is secured and surgery opens the blocked passage, most children breathe well, feed better, and grow as expected.
Prognosis refers to how a condition tends to change or stabilize over time. After repair, some children develop narrowing again (restenosis) and may need additional procedures, nasal stents for a short period, or medications to reduce swelling and scar tissue. Hearing, speech, and sinus health are watched closely because persistent congestion, middle-ear fluid, or recurrent infections can affect development; timely hearing checks and speech therapy, when needed, help keep milestones on track. When choanal atresia occurs with other syndromes (such as CHARGE), the overall outlook depends on those additional medical needs, so coordinated specialty care matters.
Looking at the long-term picture can be helpful. With modern neonatal support and surgery, survival for isolated choanal atresia is very high, and most children lead active lives without daily breathing limits. Early symptoms of choanal atresia, like noisy breathing, pauses in breathing during feeds, or bluish color that improves with crying, tend to resolve once the blockage is corrected. Regular follow-up in the first year is common, then visits usually space out as the airway remains open and growth is steady. Talk with your doctor about what your personal outlook might look like.
Long-term effects
Choanal atresia can leave lasting effects that show up most in breathing, sleep, and how the voice sounds. Many families remember that early symptoms of choanal atresia included noisy breathing during feeds, but over time the focus shifts to longer-term patterns. Long-term effects vary widely and depend on whether one or both sides were blocked and whether surgery was needed. Some changes improve with growth or after repair, while others persist or return and need watching.
Some people continue to have partial nasal obstruction or congestion. This can be more noticeable during colds or seasonal allergies.
Snoring and mouth breathing can continue into childhood, and some develop obstructive sleep apnea. These patterns may be more common in those with bilateral choanal atresia.
The voice may sound “stuffy” or less nasal (hyponasal) because airflow through the nose stays limited. This can be most noticeable when speaking quickly or during a cold.
Limited nasal airflow and drainage can raise the risk of repeated sinusitis. For some, episodes lessen with age, but others continue to have flares in adulthood.
How is it to live with Choanal atresia?
Living with choanal atresia can range from intense medical care in infancy to routine monitoring as a child grows, depending on whether one or both nasal passages are blocked and whether other conditions (like CHARGE syndrome) are present. Daily life after repair often includes nasal rinses, follow-up visits, and sometimes additional procedures to keep the airway open; many children eat and sleep better over time, but colds can still feel tougher and may need closer attention. Families and caregivers often become skilled at spotting breathing effort, feeding fatigue, and signs of blockage, and they play a big role in coordinating care with ENT and pediatric teams. For many, the arc bends toward steadier breathing and typical activities, with planning and support reducing stress for both the child and the people around them.
Treatment and drugs
Choanal atresia is treated by opening the blocked back passage of the nose so air can flow from the nostrils to the throat. Newborns with both sides blocked often need urgent support to breathe and feed, followed by surgery under general anesthesia to create or widen the nasal opening; a soft stent may be placed for a short time to help keep it open. For one-sided choanal atresia, timing is less urgent, but surgery is still the main treatment to improve airflow and reduce infections, snoring, and feeding issues. Medicines that ease symptoms are called medical therapy, and may include saline rinses, nasal steroid sprays, and antibiotics when infections occur, but these do not correct the blockage itself. Follow-up care usually involves nasal cleaning, monitoring for scar tissue or re-narrowing, and occasional touch-up procedures, and your doctor can help weigh the pros and cons of each option.
Non-drug treatment
Choanal atresia can make breathing through the nose difficult, especially during sleep and feeding. Non-drug steps focus on easing airflow, keeping the nose clear, and supporting feeding before and after surgery when needed. Non-drug treatments often lay the foundation for safety and comfort while you and your care team plan next steps. Care teams may first stabilize breathing while checking early symptoms of choanal atresia.
Keeping the head raised or lying on the side can make breathing easier. This can be especially helpful during sleep and feeds.
Saltwater nose drops and a cool-mist humidifier help loosen thick mucus. Clearer mucus passages can reduce noisy breathing and improve comfort.
A small bulb or low-pressure suction can remove mucus that blocks airflow. Caregivers are shown how to do this safely to avoid irritation.
A soft mouthpiece or specially designed nipple can help newborns breathe around a blocked nose. This can be a temporary bridge until a longer-term plan is in place.
Your genes may have an impact on how drugs work for you
Medications given around surgery for choanal atresia—like anesthetics, pain relievers, and antibiotics—can work differently depending on genes that affect how fast your body activates or clears them. Knowing this, clinicians may adjust drug choice or dose to improve safety and recovery.
Pharmacological treatments
Medicines can help with symptoms and healing in choanal atresia, but they don’t correct the blockage itself—surgery does. Drugs that target symptoms directly are called symptomatic treatments. Early symptoms of choanal atresia like noisy breathing and trouble feeding may ease slightly with certain drops or sprays, yet most people need an operation for lasting relief. After repair, medications can lower swelling, prevent infection, and support smoother recovery.
Isotonic saline nasal spray or drops help loosen mucus and keep stents moist after choanal atresia repair. They can ease crusting and make breathing and suctioning gentler.
Oxymetazoline or phenylephrine nose drops may shrink swelling briefly. Use only under medical guidance and usually for up to 3 days to avoid rebound.
Fluticasone, mometasone, or budesonide sprays can calm inflammation, especially after surgery. They may lower granulation tissue and help keep the nasal passage open.
Budesonide mixed with saline is sometimes used as a gentle rinse. This targeted approach can reduce swelling and crusting around the repair.
Genetic influences
Most cases of choanal atresia appear to happen by chance during early development, with no clear pattern in the family. Genetics can still play a role, especially when both sides of the nose are blocked or when choanal atresia occurs alongside other birth differences. When doctors look for the genetic causes of choanal atresia, they often consider CHARGE syndrome, which is frequently linked to a change in a gene called CHD7, as well as a few rarer craniofacial syndromes. DNA testing can sometimes identify these changes. If a syndrome is confirmed, inheritance may follow a dominant pattern, but many gene changes are new in the child (de novo), so parents typically haven’t passed them on. For isolated choanal atresia with no other findings, the chance of it happening again in a future pregnancy is usually low, though discussing your specific family history with a genetics professional can help clarify personal risk.
Is Choanal atresia genetic?
Genetics plays a role in choanal atresia, especially when it appears with syndromes like CHARGE. Many cases are isolated with no clear inheritance. Variations can raise risk, but most families have low recurrence; a genetics consult can clarify individual risk.
Pharmacogenetics—how genetics influence drug effects
Genetic factors can influence treatment choices for choanal atresia, mostly around anesthesia and pain control rather than long-term medicines. Genetic testing can sometimes identify how your body handles certain anesthesia drugs and pain medicines, helping the team choose safer options and doses. When choanal atresia occurs as part of a genetic syndrome such as CHARGE, differences in the heart, airway, or kidneys can change how drugs are processed or cleared and shape the anesthesia plan. A rare inherited risk called malignant hyperthermia can cause dangerous reactions to some anesthesia medicines; knowing a family history or test result lets clinicians avoid those triggers. Gene differences that affect how the body activates codeine can make it either too weak or too strong in children, so many teams avoid codeine and use alternatives with more predictable effects. After surgery, if acid-reducing medicines or steroid sprays are used, gene differences that affect how these drugs are broken down can influence the dose, and your specialists will adjust based on age, size, and any genetic information.
Interactions with other conditions
Colds, allergies, or acid reflux can make nasal blockage feel worse for people with choanal atresia, and this can be most noticeable after surgery when tissues are healing. A condition may “exacerbate” (make worse) symptoms of another, so even a simple upper respiratory infection can temporarily amplify noisy breathing or feeding difficulty in choanal atresia. Choanal atresia also commonly occurs as part of CHARGE syndrome, which can include heart, eye, and ear differences; when these occur together, hospital stays, anesthesia plans, and recovery often need extra coordination. It may also appear with cleft palate or a small jaw, and with other airway differences, which can add to feeding challenges, ear infections, and sleep‑disordered breathing. In newborns, early symptoms of choanal atresia—such as noisy breathing, blue spells during feeding, or poor weight gain—can be harder to untangle if a baby also has lung or heart disease. Because of these overlaps, care from multiple specialists, including ear‑nose‑throat, cardiology, and genetics, can help tailor treatment and reduce complications.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
History
Throughout history, people have described newborns who could cry loudly but turned blue when they tried to breathe quietly. Midwives learned that flipping the baby onto their stomach or gently crying kept air moving through the mouth. Looking back, these stories likely reflect choanal atresia, a condition where the back of the nasal passages is blocked.
First described in the medical literature as a complete nasal blockage at the rear of the nose in the late 19th century, choanal atresia was initially recognized only after birth when feeding and breathing were difficult at the same time. Early doctors used mirrors and simple probes to confirm a blockage. Surgery in those days was limited, and techniques varied widely. Over time, descriptions became more precise, separating bony from softer tissue blockages and noting when one side versus both sides was affected.
As medical science evolved, safer anesthesia, antibiotics, and better visualization tools changed outcomes. The arrival of nasoendoscopy allowed clinicians to see the blockage directly. Imaging with CT scans clarified the anatomy and guided planning, especially when choanal atresia occurred with other features, such as in CHARGE syndrome. Reports also recognized that some babies had single-sided atresia discovered later in childhood because they breathed well enough through the other side, while both-sided atresia presented immediately after birth.
In recent decades, awareness has grown about how newborns rely heavily on nose breathing. This understanding reinforced why early symptoms of choanal atresia can be so striking during quiet rest or feeding, yet ease when a baby cries and pulls air through the mouth. Surgeons refined approaches from open operations to endoscopic techniques through the nose, reducing scarring and improving long-term patency. The use of small stents has been debated and tailored to individual cases rather than used routinely.
Advances in genetics did not identify a single cause for isolated choanal atresia, but they did clarify its place within broader developmental pathways of the face and skull, and its association with certain syndromes. These historical steps shaped today’s care: rapid bedside recognition in the delivery room, careful airway support, and timely, minimally invasive repair when needed. Despite evolving definitions, the central goal has stayed the same—restore a clear nasal pathway so babies can breathe comfortably, feed safely, and grow.