Adenoid Hypertrophy

What the Adenoid Is and Why It Matters in Children

The adenoid is a mass of lymphoid tissue located behind the nose, just above the soft palate. It is present at birth and, in early childhood, enlarges physiologically because it acts to “recognise” the microbes that enter the upper airway. This enlargement is not a disease; on the contrary, it is part of the normal development of the immune system. In the typical course, it reaches its largest size between the ages of 3 and 6, gradually begins to shrink after the age of 7-8, and largely regresses towards adolescence.

The problem begins at the point where this physiological enlargement outgrows the child’s anatomy. Because the adenoid sits in a narrow passage behind the nose, once it exceeds a certain volume it mechanically obstructs the back opening of the nose. As the opening of the Eustachian tube — which ventilates the middle ear — is also located in the same region, an enlarged adenoid likewise impairs middle ear ventilation. For this reason, adenoid enlargement is not simply a “nasal problem”; it produces a broad picture in the child that is measured through sleep quality, hearing, speech and even facial development.

In paediatric ENT practice, the adenoid is one of the most frequently encountered topics and, when addressed at the right time, one of the most rewarding. The key decision here is not “should it be removed or not”; rather, it is the question of “in which direction is the current picture heading, and when is intervention required”.

From the Parent’s Perspective: How Adenoid Enlargement Is Noticed

A child cannot say “there is something behind my nose”. For this reason, the picture emerges from the parent’s observations. The most typical finding is chronic mouth breathing: the child’s mouth is constantly open during sleep, and during the day they breathe through the mouth without realising it. The nose is persistently blocked; yet there is not always a painful infection — one simply speaks of a child with a “stuffy nose”.

Accompanying findings include:

• Snoring during sleep: Regular snoring heard almost every night. In some children this is accompanied by brief pauses in breathing, sweating and restless turning.
• Nasal speech: The child’s voice sounds “blocked”, as though they have a constant cold.
• Night-time cough: A dry cough caused by post-nasal drip running backwards, which worsens when lying down.
• Frequent or prolonged nasal discharge: Discharge ranging from clear to dark green that never quite resolves.
• Frequent middle ear infections or earache: Adenoid enlargement is the most common cause of middle ear problems.
• Loss of attention in class, daytime drowsiness: A child who sleeps poorly at night is either tired during the day or, paradoxically, appears hyperactive.
• Poor appetite and failure to gain weight: Chronic mouth breathing and sleep disturbance can even affect the growth curve.
• The typical “adenoid face” appearance: An open-mouth posture, a slightly raised upper lip and a long, flat facial appearance. In long-standing cases, this also affects the palate and dental structure.

It is not necessary for all of these findings to be present in a single child. The combination of mouth breathing, snoring and frequent ear infections is on its own sufficient grounds for evaluation.

Parents often ask, “aren’t all children at nursery age like this?”; the answer is partly “yes”. Upper respiratory tract infections are common at this age, and mild nasal congestion or transient snoring is unremarkable. What matters is the persistence of the findings and their effect on daily life: whether the child mouth-breathes even between episodes of infection, whether snoring continues over the following months, whether sleep is genuinely restorative, and how daytime performance is — the answers to these questions clarify the boundary between what is “ordinary” and what “requires evaluation”.

Causes and Risk Factors

Why the adenoid enlarges beyond the ordinary limit in some children cannot be attributed to a single cause. In practice, several factors come together:

• Recurrent upper respiratory tract infections: Viral infections frequently experienced during the nursery period continually stimulate the tissue, sustaining its enlargement.
• An allergic background: Inhalant allergens such as house dust mites, pollen and animal dander cause chronic swelling of the nasal mucosa and accompanying adenoid enlargement.
• Passive smoking: Smoking in the home markedly increases adenoid and middle ear problems.
• Reflux: Particularly in the younger age group, silent reflux can predispose to chronic irritation and tissue enlargement in the upper airway.
• Family history: A tendency is seen more frequently in children whose parents have a similar history.
• Anatomical factors: In a child whose back nasal passage (choana) is already narrow, even a small adenoid can produce disproportionate symptoms.

The Diagnostic Process

In assessing the adenoid, the aim is not merely to confirm the presence of the tissue; it is to establish the proportion between the child’s symptoms and the size of this tissue.

1. Detailed history: How long mouth breathing has been present, what the sleep pattern is like, how many ear infections have occurred, the allergy history, smoking in the home, and similar conditions in the family.
2. Physical examination: Examination of the front of the nose, assessment of the mouth and throat, and inspection of the eardrums. The adenoid cannot be seen directly on front examination; for this reason, indirect findings are important.
3. Endoscopic assessment: A very fine, flexible fibre-optic endoscope is passed through the nose to visualise the adenoid directly. This is today the gold-standard method; it is painless, and the child’s being able to see their own adenoid on the screen improves cooperation with the treatment process.
4. Audiological tests: As adenoid enlargement almost always affects the middle ear, a hearing test (age-appropriately: otoacoustic emissions, tympanometry, pure-tone audiometry) is added in most cases.
5. Sleep history and a sleep study where necessary: If there is marked snoring or pauses in breathing, a sleep study (polysomnography) may be recommended to determine the degree of sleep apnoea.

In most cases a plain radiograph (lateral view) is not even required; endoscopic imaging has taken its place.

Treatment Approaches

Medical Management First

In mild or moderate cases, particularly when an allergic background is prominent, the first step is medical treatment:

• Nasal corticosteroid sprays (regular use for at least 6-8 weeks)
• Antihistamines and environmental measures (bedding, carpets, contact with pets) if an allergic picture is present
• Dietary and lifestyle adjustments where reflux is suspected
• Complete elimination of exposure to passive smoking

If symptoms regress markedly within 6-12 weeks of follow-up during this process, surgery may not become necessary.

Indications for Surgery (Adenoidectomy)

If an adequate response to medical treatment is not obtained, or if the picture is severe enough to require surgery from the outset, removal of the adenoid (adenoidectomy) is considered. Typical indications include:

• Persistent and marked nasal obstruction, chronic mouth breathing
• Marked snoring during sleep, obstructive sleep apnoea
• Recurrent or chronic middle ear infection, middle ear fluid lasting longer than three months
• Middle ear fluid leading to hearing loss
• Recurrent sinusitis due to post-nasal drip
• A long-standing picture likely to affect speech development

How the Surgery Is Performed

Adenoidectomy is performed through the mouth; there is no skin incision. The child is under short-term general anaesthesia and the procedure takes around 20-30 minutes on average. Where necessary, the placement of a grommet (ear tube) or a tonsil procedure may be performed in the same session. The surgery may be combined in this way so that the child is not given anaesthesia twice.

After the procedure the child is woken within a few hours and is usually discharged the same day, sometimes after one night of observation.

Process and Recovery

Recovery after adenoidectomy is markedly milder than after tonsil surgery, because the tissue does not occupy a deep surgical field and is not located in a region behind the nose where the child feels pain directly.

• The first 24 hours: Mild throat discomfort, sometimes temporary bad breath. Most children begin to take fluids within a few hours.
• The first 2-3 days: Soft food and plenty of fluids are recommended. Most children feel the relief in their nose from the very first night.
• 5-7 days: Return to normal activity. A return to school is usually possible within this period.
• 2-4 weeks: The marked improvement in sleep quality settles in during this time; snoring typically decreases noticeably within the first week.

Pain is at a level manageable with simple analgesics such as paracetamol. Nasal bleeding is rare, and a feverish reaction is not an expected occurrence; if such findings arise, consulting a doctor is recommended.

Another subject parents frequently ask about is whether the adenoid will “grow back”. It is rare for the tissue to regrow completely after adenoidectomy and for the same complaints to recur. The reason for this is that adenoid tissue naturally regresses with adolescence in any case, and surgery only brings this process forward slightly in time. In procedures performed at a very young age (for example, under 2 years), there may be some mild regrowth later; however, in the great majority of these children it does not reach a size that produces renewed complaints.

From the parent’s perspective, the most tangible improvement is usually sleep. When a child who has snored every night for years begins, from the very first night, to sleep quietly and restfully, this is often a moment when the family asks “why did we wait so long”. For this reason, once a decision regarding the adenoid has been made, timing is important: intervention carried out as early as possible within the child’s developmental window is the approach that leaves the least trace.

The Effect on School and Development

The long-term effects of adenoid enlargement are not limited to sleep and nasal obstruction. Three areas are particularly important:

Hearing and speech development. In cases accompanied by chronic fluid in the middle ear, the child cannot clearly hear the softer reflections of sounds. This leads, particularly in the 2-5 age range, to certain consonants being learned late and incompletely. When middle ear ventilation is restored by removal of the adenoid, most children show a marked leap in their speech within a few months; in delayed cases, speech therapy may be required.

Facial and palatal development. Long-standing mouth breathing can be reflected in inadequate horizontal development of the upper jaw, in the palate taking on a high and narrow form, and in the alignment and bite of the teeth. Early intervention can reverse this process; in cases left to a later age, orthodontic support may be required.

School performance and behaviour. A child who sleeps poorly at night may appear tired, distracted or, paradoxically, overly active during the day. This picture is sometimes confused with attention deficit. In children whose sleep improves after adenoid treatment, attention in lessons, behavioural adjustment and daytime energy improve markedly.

When to Consult a Paediatric ENT Specialist

The following situations are sufficient grounds for an evaluation to be carried out; none of them on its own means surgery:

• The child regularly sleeping with the mouth open and/or snoring every night
• Pauses in breathing during sleep, an appearance of gasping for breath
• More than 4 episodes of middle ear infection per year, or middle ear fluid lasting longer than three months
• Mouth breathing and nasal speech that have become persistent
• Speech that is delayed for the age, an inability to produce certain sounds
• An unexpected decline in attention and performance in class
• Lagging on the growth curve compared with peers

Early evaluation often makes it possible to manage the condition with medical follow-up rather than making surgery necessary. Even where the picture requires surgery, intervention within the child’s developmental window is the approach that leaves the least trace in the long term. In case of doubt, assessment by a paediatric ENT specialist determines the correct boundary between watchful waiting and intervention.