Macroglossia is a condition where your tongue is larger in size compared to that of a normal person. This is more commonly seen in children. It often presents in association with other conditions like Beckwith-Wiedemann syndrome and Down syndrome.

What is macroglossia?

Macroglossia is also known as giant tongue or enlarged tongue. It is characterized by a larger-than-normal tongue that causes protrusion of the tongue beyond the dental arch. Macroglossia is generally a painless enlargement of the tongue over time.¹

Types of macroglossia 

There are 2 types of macroglossia: true macroglossia and relative macroglossia. In true macroglossia, the enlargement occurs due to underlying conditions like Down syndrome and Pierre Robin syndrome. In relative macroglossia, the tongue is not actually enlarged but appears larger when compared to other structures in the oral cavity.²

What causes macroglossia?

Macroglossia mostly occurs because of underlying conditions. This can be either inherited by birth or acquired due to some illness. Certain treatments and surgeries also cause macroglossia. In rare cases, some people have this condition by birth, with no specific cause.

Inherited conditions that can cause macroglossia include

• Down syndrome patients have genetic changes that alter their physical and mental growth
• Beckwith-Wiedemann syndrome is a growth disorder that causes an increase in the size of your organs and body. The majority of these patients have macroglossia
• Hunter syndrome is a condition which affects your body’s ability to break down sugar
• Prader-Willi syndrome is a genetic disorder causing short stature, intellectual impairment, and delayed puberty
• Achondroplasia is a genetic disorder characterized by features of dwarfism like decreased stature and short arms and legs³

Acquired conditions causing macroglossia are

• Hypothyroidism is when the thyroid cannot create enough thyroid hormone, slowing down the metabolism of your body
• Amyloidosis is a disorder that causes protein build-up in the body, which affects the functioning of the organs. Macroglossia is one of the characteristic symptoms of amyloidosis.
• Diphtheria infection causes swelling of your tongue
• Acromegaly is a condition where your body produces too much growth hormone during your adulthood period. This leads to an increase in the size of your tongue, hands and feet, and jaws

Other causes

• Tumors like Lymphoma, Lipoma & Neurofibromatosis
• Congenital malformations like vascular malformations, lymphatic malformations, neuromuscular disorders, infectious diseases and trauma
• Some surgeries and treatments can also lead to macroglossia

What are the common signs and symptoms seen in macroglossia?

The most common symptom of macroglossia is a thick, enlarged, and protruded tongue. Other symptoms include:⁴

• Stridor - It is a noisy high-pitched type of breathing sound
• Stertor - This is a snore or a low-pitched type of breathing sound
• Dysphagia - Eating and drinking difficulty due to the large size of the tongue
• Tongue injury due to frequent biting of the tongue
• Drooling is a result of your mouth remaining open for most of the time because of the large size of the tongue.
• Abnormal jaw growth
• Ulcers and fissures on the tongue
• Difficulty feeding and swallowing
• Recurrent infections
• Upper airway obstruction
• Spacing between teeth
• Change in normal biting 
• Dry mouth
• Sleep apnea - A sleeping disorder where breathing suddenly stops and starts due to obstruction caused by the large tongue

Clinical presentation of macroglossia

• Patients with macroglossia often present with a tongue that is visibly larger, protruded, elongated, and thickened. This condition can lead to several noticeable symptoms and complications
• One common issue is difficulty with eating, swallowing, speaking, and feeding, which can significantly affect daily life. The tongue's size may also alter the alignment of the teeth, leading to an open bite or changes in the dental arches as the jaws adjust to accommodate the enlarged tongue
• Breathing through the mouth is frequently observed, and the condition can contribute to sleep apnea, causing difficulties in breathing during sleep. The mouth often remains open, leading to excessive drooling, a condition known as sialorrhea. Additionally, patients may develop ulcers or fissures on the tongue due to its size and positioning
• Macroglossia can also increase the risk of upper respiratory tract infections and airway obstruction in some cases. The physical appearance associated with the condition may cause psychological distress, including anxiety and stress, especially in social situations

Addressing these challenges involves a combination of medical, dental, and psychological interventions tailored to the individual's needs.⁵

Diagnosis of macroglossia based on clinical presentation 

Patients with macroglossia usually present a wide variety of symptoms. These symptoms should be properly evaluated in order to formulate a good treatment plan.

The steps involved are:⁶

1. History taking: Diagnosis of macroglossia must begin with a proper history taking to note any underlying congenital or acquired conditions.

2. Physical examination: The doctor examines the patient's tongue, oral cavity, head and neck. Macroglossia typically presents with an enlarged tongue protruding beyond the teeth. Other symptoms include eating, feeding and speaking difficulties, and loss of weight. Airway obstruction and signs of pulmonary hypertension are also seen in some cases that can be life-threatening
3. Evaluation: The tongue should be carefully evaluated to identify any undiagnosed conditions. Changes in colour, consistency, and presence of masses are also noted
4. Imaging studies: These studies help to show the extent and growth of tumours or masses in any underlying diseases
   • CT scan: Computed tomography scans make use of X-rays and computers in order to create three-dimensional images of the head and neck region. CT scan is helpful in cases of obstructive sleep apnea.
   • MRI scan: Magnetic Resonance Imaging produces clear images of the body's organs and structures using magnetic and radio waves
   • Cephalometric and panoramic radiography: These radiography methods can detect any associated skeletal and dental deformities.
   • Barium swallow study is used to rule out any upper airway obstructions.
   • Ultrasonography detects the size of the lesion in the tongue
5. Biopsy = Biopsy of tissues helps to identify if any underlying pathologic condition is causing macroglossia

How to prevent macroglossia?

Genetic conditions that cause macroglossia cannot be prevented. However, some cases of macroglossia associated with infections can be prevented to an extent by taking protection against infectious diseases.⁷ 

Treatment of macroglossia 

Treatment of macroglossia includes medications, surgery, orthodontic treatment, and radiation therapy. In most cases, treatment begins with diagnosis and management of the underlying conditions, following the treatment of macroglossia.

• Medications like corticosteroids are used to reduce swelling of the tongue 
• Sclerosing agents, cryotherapy, and electrocautery are also used to control inflammation and bleeding 
• Orthodontic treatment is used to treat the malalignment of teeth associated with macroglossia 
• Surgery is indicated in severe cases when there is an underlying neoplasia, or in cases of impairment in speech and difficulty in swallowing. The surgical procedures involved are partial glossectomy and reduction glossectomy. The glossectomy procedure involves the surgical reduction of an enlarged tongue to a size resembling that of a normal tongue and functioning more efficiently.

FAQs

What causes macroglossia?

Macroglossia occurs due to inherited conditions like Down syndrome or acquired conditions like amyloidosis and hypothyroidism. It may also occur due to some tumours, infections, or trauma.

Can macroglossia be treated?

Macroglossia can be treated using medications, orthodontic treatment, surgery, or radiation therapy, depending on the cause.

How do you diagnose macroglossia?

Diagnosis of macroglossia involves history taking, physical examination, careful evaluation of the symptoms, and the use of imaging studies to detect any underlying pathologies.

Summary

Macroglossia, defined as an enlarged tongue, is commonly associated with genetic or acquired conditions. It can cause significant challenges, including difficulties with feeding, swallowing, breathing, and speaking. Dental issues, such as misaligned teeth and asymmetry of the dental arches, often result from the tongue's size. Severe cases may lead to sleep apnea, airway obstruction, drooling, and recurrent infections, contributing to both physical discomfort and psychosocial distress.

Diagnosing macroglossia involves a detailed medical history to identify potential underlying causes, such as genetic syndromes or systemic conditions. A thorough physical examination assesses the size, texture, and functionality of the tongue and evaluates its impact on surrounding structures. Imaging studies, including MRI and CT scans, help detect structural abnormalities, tumours, or vascular anomalies. In certain cases, a biopsy is required to rule out malignancies or specific infiltrative conditions.

Treatment strategies vary depending on the cause and severity of macroglossia. Medications can manage inflammation or infections, while orthodontic interventions address dental complications. Surgical reduction of the tongue is often necessary in more severe cases to improve functionality and reduce complications. Preventive measures can minimize cases linked to infections, but most instances stem from underlying medical conditions, which require targeted management. Addressing these root causes is essential for effective treatment and improving patient quality of life. Advances in diagnostic tools and personalized treatment approaches have significantly enhanced outcomes for individuals with macroglossia.