Third tonsil in children – check how it affects the immune system, learn about the symptoms of an enlarged tonsil, effective treatment and indications for its removal.
Table of Contents
- What is the adenoid and what is its role in the body?
- Adenoid and immunity – how does it affect the immune system?
- Enlarged adenoid – causes, symptoms, and diagnosis
- When should the adenoid be removed? Indications for adenotomy
- Conservative treatment and home remedies to support child health
- Complications and consequences of untreated adenoid hypertrophy
What is the adenoid and what is its role in the body?
The adenoid, also known as the pharyngeal tonsil or adenoids, is a small but extremely important immune system structure located at the back of the nasopharynx, just behind the nose, at the roof of the throat. It belongs to the so-called Waldeyer’s ring, which also includes the two palatine tonsils and the lingual tonsil. The adenoid consists of lymphatic tissue that plays a key role in protecting a child’s body from infections. It is most active during childhood, especially up to about 7–8 years old, and then typically gradually disappears as part of the physiological involution process. The significance of the adenoid lies in the fact that it forms the first line of defense against pathogens entering the upper respiratory tract through inhaled air or food passing through the throat. The adenoid’s role is to capture, recognize, and neutralize bacteria, viruses, and other disease-causing microorganisms before they penetrate deeper into the body. The lymphatic cells that make up the adenoid are responsible for producing antibodies and activating immune responses. In the early years of life, when a child’s immune system is still developing and learning to recognize threats, the proper function of the pharyngeal tonsil is particularly important, helping to build immunological memory and defend against recurring infections.
The structure and function of the adenoid differ from other protective elements in the mouth and throat because it is located in a place not visible during a routine medical examination, which often makes it difficult to assess its size and potential problems. As part of the tissue-based immune mechanism, the pharyngeal tonsil helps to recognize antigens and stimulates the production of B and T lymphocytes, which are responsible for generating specific antibodies and cells capable of destroying pathogens. Thanks to this activity, the adenoid acts as a biological filter, capturing harmful microorganisms and supporting overall immunity. As children age, the adenoid’s function decreases as other elements of the immune system develop and take over its protective role. However, in some cases, the adenoid may become unpredictably enlarged (hypertrophied), leading to several health issues. An excessively enlarged pharyngeal tonsil may cause difficulty breathing through the nose, frequent infections, and even hearing or bite problems. For this reason, both recognition and assessment of the adenoid are important in the diagnostic process for children. Its presence in childhood is physiological in most cases and supports the development of immunity, performing a protective function that naturally disappears over time as the immune system matures and builds immunological memory.
Adenoid and immunity – how does it affect the immune system?
The adenoid is one of the key components of the body’s first line of defense against microorganisms in children, acting as a guardian protecting the throat and the airways from infections. Its location in the nasopharynx exposes it to direct contact with inhaled bacteria, viruses, and other pathogens. The structure of the adenoid allows it to trap and retain antigens from air and food before they reach the deeper parts of the respiratory tract. This triggers a cascade of immune reactions – the immune cells within the pharyngeal tonsil (B and T lymphocytes, macrophages, dendritic cells) recognize the threat and stimulate antibody production, including immunoglobulin A (IgA), which plays a crucial role in protecting mucous membranes. Thanks to this mechanism, the adenoid significantly contributes to so-called local immunity, protecting the child from many upper respiratory tract infections. Additionally, during childhood it serves as an intense “training ground” for immune cells – contact with various pathogens helps the immune system improve its memory, leading to better responses to repeated infections later in life. It’s no coincidence that the adenoid is largest and most active in the early years when the immune system is learning to recognize and neutralize threats, and the protection established during this period may contribute to the ability to cope with infections throughout later life.
However, it’s worth noting that while the adenoid plays an extremely important role in shaping immunity, excessive hypertrophy can have the opposite effect. When the adenoid becomes pathologically large, it may block the nasopharynx, causing difficulty breathing through the nose, recurring sinus and middle ear infections, and may also become a source of chronic inflammation. An enlarged adenoid ceases to be an effective filter and turns into an environment where bacteria and viruses can proliferate more easily, making it easier for them to enter the body. This impairs proper middle ear ventilation and nasal discharge drainage, often resulting in hearing loss and delayed speech development, which can have a long-term impact on the child’s overall development. Chronic inflammation may even weaken the efficiency of the whole immune system, making the child more vulnerable to not only respiratory tract but also systemic infections. The dilemma around the function of the adenoid in children thus comes down to balance: on one hand, one should not rush to remove a functioning adenoid that still supports immunity, while on the other hand, symptoms of hypertrophy and chronic inflammation should never be ignored, as they can seriously disturb breathing, hearing, and the effectiveness of the immune system during growth. The final decision about conservative treatment or surgical intervention should always be made individually, considering both the immunological benefits and possible complications from pathological enlargement of the adenoid.
Enlarged adenoid – causes, symptoms, and diagnosis
Adenoid hypertrophy, i.e., pathological enlargement of the pharyngeal tonsil, is a common phenomenon among children, especially in preschool and early school age. The increase results mainly from excessive stimulation of the immune system due to constant exposure to bacteria, viruses, and allergens – both environmental and food-related. Frequent respiratory tract infections, especially upper respiratory infections, chronic inflammation, and recurring throat, nose, and sinus diseases can lead to continuous stimulation and growth of the adenoidal lymphatic tissue. Genetic predisposition and environmental factors, such as exposure to cigarette smoke, dryness and air pollution, or even the presence of allergies or gastroesophageal reflux, are also relevant. Immunological immaturity and prolonged antibiotic therapy that disrupts the natural bacterial flora may also predispose to adenoid hypertrophy. In some cases, even a trivial infection or chronic allergic rhinitis can cause persistent enlargement of this structure.
The symptoms of adenoid hypertrophy are diverse and often non-specific, but most children suffer from chronic nasal breathing difficulties – resulting in characteristic mouth breathing, especially at night, as well as snoring and sleep apnea, which may lead to interrupted and restless sleep. Common symptoms also include recurring respiratory tract infections, chronic nasal or throat discharge, dry mouth, headaches, a feeling of nasal blockage, and hearing impairment due to blocked (Eustachian) tubes. Some children may show slower speech development, apathy, difficulty concentrating, and a so-called “adenoid face” – characterized by an open mouth, elongated facial features, narrowed nose, and protruding upper lip. Chronic nasal obstruction and the presence of secretions may lead to complications such as recurring middle ear infections, hearing loss, and even dental complications (malocclusion, caries due to dry mouth). The diagnosis of adenoid hypertrophy is primarily based on a thorough medical history and otolaryngological examination. Owing to the adenoid’s anatomical location, nasopharyngeal endoscopy is usually employed, enabling full visualization of its size and assessment of airway obstruction. Alternatively, a targeted lateral cranial X-ray (focusing on the nasopharynx) or ultrasound can be used. It is crucial to differentiate symptoms to exclude other causes such as nasal polyps, chronic infections, or anatomical anomalies. In some cases, the doctor may recommend additional hearing tests (audiometry, tympanometry), sleep quality assessment (polysomnography), or an allergy consultation. Early and accurate diagnosis of adenoid hypertrophy is vital for choosing the right treatment and preventing developmental complications in children.
When should the adenoid be removed? Indications for adenotomy
The decision to remove the adenoid (adenotomy) is based on precisely defined clinical indications and must always be preceded by thorough diagnosis, an individual assessment of the child’s health, and consideration of potential benefits and risks. The most common reason for referring a child for adenotomy is significant adenoid hypertrophy leading to persistent nasal breathing obstruction. Chronic nasal blockage forces the child to breathe mainly through the mouth, contributing to frequent upper respiratory tract infections, snoring, sleep apnea episodes, and sleep disturbances such as irritability, excessive daytime sleepiness, or concentration problems. Untreated adenoid hypertrophy may also cause malocclusion, abnormal speech development, articulation disorders, and chronic sinusitis. Furthermore, prolonged nasal obstruction impairs proper body oxygenation, negatively affecting the child’s physical and cognitive development. A particular indication for adenotomy is complications involving the auditory system – hypertrophied adenoid can block the openings of the Eustachian tubes, resulting in recurring serous otitis media, conductive hearing loss, or even permanent hearing impairment. In such cases, speech comprehension deteriorates, and there may be delays in the child’s language development. Adenotomy is also indicated in chronic, recurring infections or tonsillitis that exhaust the body and frequently require antibiotics, which carries the risk of drug resistance and disturbances of gut microbiota. If the adenoid exhibits pathological features — such as being associated with a tumor, rapid enlargement, or symptoms suggesting other tumors — urgent surgical intervention may be necessary.
In clinical practice, the decision to perform adenotomy is usually made after exhausting available conservative treatment options, i.e., if pharmacotherapy (antibiotics, nasal steroids), immunomodulation, improved nasal hygiene, or allergen elimination fails to bring improvement. It is important to stress that not every case of adenoid hypertrophy requires removal – in many children, the pharyngeal tonsil shrinks naturally as the immune system develops and symptoms disappear. The ENT (otolaryngologist) will recommend adenotomy if symptoms reduce the child’s quality of life, impede daily functioning, cause chronic fatigue, delayed intellectual development, or behavioral disorders. Children with co-existing conditions, such as bronchial asthma, allergies, Down syndrome, or neurological disorders, require special attention because chronic airway inflammation and hearing complications may aggravate the course of their primary diseases. Contraindications include active infections, clotting disorders, or very young age – adenotomy is usually performed in children over 2–3 years old. The role of parents in the decision-making process and their awareness of the consequences of untreated adenoid hypertrophy is crucial. Close cooperation with a pediatrician and ENT specialist, documentation of observed symptoms, and regular specialist follow-up are essential. If complications such as hearing loss, chronic cough, developmental delay, or recurring infections resistant to medication are present, adenotomy is clearly indicated due to the risk of permanent health problems. Adenotomy is a safe and routine procedure, rarely associated with serious complications and—with proper qualification—significantly improves comfort and child development.
Conservative treatment and home remedies to support child health
Conservative treatment of adenoid hypertrophy is the first step in therapy—especially in children without complications or clear indications for surgery. The main goal is to alleviate symptoms, prevent complications, and support immune function without surgical intervention. In practice, this encompasses a range of measures, from medication under strict medical supervision to various home remedies and lifestyle changes. The most important element of conservative care is the control and alleviation of respiratory tract infections—periodic anti-inflammatory medication, nasal preparations (e.g., topical intranasal corticosteroids), and short-term antibiotics for confirmed bacterial infections are used. Antihistamines and allergen elimination are recommended for children with allergy symptoms. Regular check-ups with an ENT specialist and monitoring of the nasal and middle ear mucosa are crucial—chronic inflammation in these structures often accompanies adenoid hypertrophy and can lead to persistent symptoms. Other aspects of conservative treatment include supporting nasal patency with moisturizing saline or seawater sprays and steam inhalations with saline or mild herbal preparations with anti-inflammatory properties. Nasal hygiene—with regular rinsing—is particularly important during infection season when the child is exposed to more pathogens. It’s also important to keep the indoor air moist, avoid cigarette smoke and smog, and minimize contact with sick people, which significantly reduces the risk of further adenoid growth and infections.
Home remedies for children with adenoid hypertrophy focus mainly on strengthening immunity, relieving symptoms, and improving daily comfort. A diet rich in fresh vegetables and fruit, whole grains, lean protein, and healthy fats provides necessary vitamins, minerals, and antioxidants that support the body’s defenses. Probiotics may also be beneficial thanks to their positive effect on gut microbiota and indirect support of the immune system. Children are encouraged to spend time outdoors, engage in regular physical activity, and get enough sleep—sufficient rest and movement are essential for immune regeneration. Parents should take care of a clean environment and regular ventilation at home, decreasing dust, mites, and potential allergens. Herbal teas with anti-inflammatory and soothing effects on the throat, such as linden, chamomile, or sage (provided only after consulting a doctor), can be helpful, and in case of intense cough, maintaining proper hydration with water or diluted juices is important. Supplementary support includes baths with essential oils (like eucalyptus or pine for bathing)—used cautiously to avoid allergic or respiratory irritation. Reducing stress in children is also vital, as chronic stress negatively impacts the immune system. Conservative treatment, combined with home remedies, can improve comfort and reduce symptoms without immediate surgery—but requires alertness, consistency, and strict adherence to medical recommendations and regular specialist monitoring of disease progression.
Complications and consequences of untreated adenoid hypertrophy
Untreated adenoid hypertrophy in children can lead to a number of complications that significantly affect day-to-day functioning and health, with consequences ranging from the respiratory system to general development. Most notably, chronic nasal obstruction forces the child to breathe mainly through the mouth, which adversely affects the formation of the face and jaw. The typical phenomenon is the so-called “adenoid face,” characterized by the elongation of the lower face, retraction of the jaw, narrowing of the nose, and persistently open mouth. This abnormality leads to bite problems, chewing difficulty, and even speech disorders. Children often suffer from chronic hypoxia because mouth breathing is less efficient than nasal breathing—the air is not properly cleaned or moistened, and less oxygen reaches the brain, translating to concentration issues, drowsiness, and even cognitive and emotional developmental delays. Another consequence is the occurrence of sleep apnea, i.e., repeated episodes of stopped breathing during sleep, which can result in disturbed sleep, daytime fatigue, learning and behavioral problems, and—in the long term—increased risk of metabolic disturbances and hypertension.
Children with enlarged adenoid are more likely to experience recurring respiratory tract infections, chronic sinusitis, sore throat, and otitis media. The build-up of secretions in the nasopharynx and impaired drainage from the auditory tubes lead to chronic ear inflammation, potentially causing hearing loss, conductive deafness, and subsequent speech development delays and communication difficulties. In some cases, so-called serous otitis media occurs, where fluid accumulates behind the eardrum, making it harder to hear sounds, which negatively impacts learning, participation in school activities, and social development. Chronic nasal obstruction and secretion retention also contribute to more frequent lower respiratory tract infections, including bronchitis and pneumonia. Persistent inflammation and long-term adenoid hypertrophy can weaken local immunity in the nasopharynx, paradoxically predisposing the child to further infections instead of protecting them. Untreated hypertrophy may also cause appetite disturbances, weight loss, and malnutrition due to recurring infections, malaise, and trouble breathing properly. Such a wide range of complications means that chronic pharyngeal tonsil hypertrophy not only affects physical health but also mental and social wellbeing—children become irritable, apathetic, and may have problems forming peer relationships or succeeding at school. All this underlines the importance of early recognition and implementation of appropriate treatment for adenoid hypertrophy to prevent lasting health and developmental consequences.
Summary
The adenoid plays an important role in building and supporting a child’s immunity. However, its hypertrophy can cause frequent infections, impaired nasal breathing, snoring, and other health complications. Early symptom recognition and proper diagnosis are crucial. Depending on the severity, treatment may involve conservative methods or the necessity of removing the enlarged adenoid. Regular care, consultations with a specialist, and proper immunity support help prevent complications and restore comfort to the child’s life.
