Kabuki Syndrome: Symptoms and Available Treatment Options

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

Kabuki syndrome, also known as Kabuki make-up syndrome, is a rare genetic disorder that affects multiple parts of the body. Characterized by distinctive facial features, growth delays, and various other physical and cognitive anomalies, it requires a nuanced approach to diagnosis and treatment.

It is a congenital disorder, meaning it is present from birth. It derives its name from the facial resemblance of affected individuals to the make-up worn by actors in traditional Japanese Kabuki theater. First described in 1981 by Japanese scientists, Kabuki syndrome has since been identified worldwide, albeit rarely, with an estimated prevalence of 1 in 32,000 births.

What Are the Types of Kabuki Syndrome?

Kabuki syndrome is classified into two main types based on the affected gene. Although both types share many clinical features, they differ in their genetic cause and inheritance pattern. Identifying the specific type helps confirm the diagnosis, guide genetic counseling, and support personalized management.

Type 1 Kabuki Syndrome (KMT2D-Related)

The most common form, accounting for approximately 70-75% of cases.
Caused by mutations in the KMT2D gene.
Usually inherited in an autosomal dominant pattern, although many cases occur due to new (sporadic) mutations.
Common features include distinctive facial characteristics, developmental delay, intellectual disability, and skeletal abnormalities.

Type 2 Kabuki Syndrome (KDM6A-Related)

A less common form caused by mutations in the KDM6A gene.
Inherited in an X-linked dominant pattern or may occur sporadically.
Symptoms are similar to Type 1 but can vary in severity, with some individuals experiencing additional growth or developmental challenges.

What Are the Common Signs and Symptoms of Kabuki Syndrome?

Kabuki syndrome can cause a wide range of symptoms that vary from person to person. While some children have mild features, others may experience developmental delays, congenital abnormalities, and health complications. Recognizing these signs early supports timely diagnosis and comprehensive medical care.

Distinctive Facial Features

One of the most recognizable aspects of Kabuki syndrome is the distinct facial appearance. Features often include elongated eyelid openings, arched eyebrows, a depressed nasal tip and large, prominent ears. These facial characteristics contribute significantly to the syndrome's diagnosis.

Growth and Developmental Delays

Children with Kabuki syndrome frequently experience developmental delays and intellectual disabilities. These can range from mild to moderate, affecting speech, motor skills, and cognitive development. Short stature is also common, often due to growth hormone deficiencies.

Skeletal Anomalies

Skeletal abnormalities are prevalent, including scoliosis, brachydactyly (short fingers), and hip dislocation. These anomalies can contribute to mobility challenges and may require orthopedic intervention.

Other Physical and Health Concerns

Kabuki syndrome can manifest in various other ways, including:

Cardiac anomalies: Congenital heart defects are present in approximately 50% of cases.
Hearing loss: Conductive hearing loss due to ear malformations is common.
Immune system deficiencies: Individuals may be more susceptible to infections due to immune dysregulation.
Endocrine issues: Problems such as hypothyroidism and hyperinsulinism may arise.

What Causes Kabuki Syndrome?

Kabuki syndrome is a rare genetic disorder caused by changes (mutations) in genes that regulate normal growth and development. These gene mutations affect proteins involved in controlling gene expression during fetal development, leading to the characteristic features of the condition.

The main causes include:

KMT2D gene mutations: Responsible for approximately 70-75% of cases, making it the most common cause of Kabuki syndrome.
KDM6A gene mutations: Account for a smaller percentage of cases and are associated with the X-linked form of the condition.
Spontaneous (de novo) mutations: Most children with Kabuki syndrome develop the condition due to a new genetic mutation without a family history.
Inherited mutations: In some families, Kabuki syndrome is passed from parent to child through an autosomal dominant (KMT2D) or X-linked (KDM6A) inheritance pattern.

Genetic testing is essential to confirm the diagnosis, identify the underlying mutation, and guide long-term management and family counseling.

When Should You See a Doctor for Kabuki Syndrome?

Consult a pediatrician if developmental concerns or characteristic features of Kabuki syndrome are noticed.

Delayed growth, speech, or developmental milestones
Distinctive facial features present from birth
Feeding difficulties or poor weight gain
Congenital heart defects or heart murmurs
Hearing loss or frequent ear infections
Skeletal abnormalities such as scoliosis or hip problems
Recurrent infections or suspected immune system problems

Early diagnosis helps prevent complications and improve outcomes.

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How Is Kabuki Syndrome Diagnosed?

Diagnosing Kabuki syndrome can be challenging due to its rarity and the variability of symptoms. A clinical diagnosis is often based on the characteristic facial features and associated anomalies. However, genetic testing has become a crucial tool in confirming the diagnosis by identifying mutations in the KMT2D or KDM6A genes.

Differential Diagnosis

It is essential to differentiate Kabuki syndrome from other conditions with overlapping symptoms, such as Noonan syndrome and CHARGE syndrome. Comprehensive genetic testing and a detailed clinical evaluation are vital to an accurate diagnosis.

What Are the Best Treatment Options for Kabuki Syndrome?

While there is no cure for Kabuki syndrome, various treatments and interventions can manage symptoms and improve quality of life. A multidisciplinary approach is often necessary, involving pediatricians, geneticists, cardiologists, endocrinologists, and other specialists.

Medical Interventions

Growth Hormone Therapy: For those with significant growth hormone deficiencies, hormone replacement therapy can promote growth and increase height.
Cardiac Surgery: Congenital heart defects may require surgical intervention to correct abnormalities and prevent complications.
Hearing Aids: Devices to assist with conductive hearing loss can enhance communication and quality of life.

Developmental Support

Early intervention programs, including physical, occupational, and speech therapy, are crucial for addressing developmental delays. The educational plans can support cognitive and social development.

Regular Health Monitoring

Continuous monitoring for potential complications, such as scoliosis progression, thyroid dysfunction and immune system deficiencies, is vital. Regular follow-ups with healthcare providers ensure timely interventions and adjustments to treatment plans.

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Can Kabuki Syndrome Be Prevented?

Currently, there are no known preventive measures for Kabuki syndrome due to its genetic nature. However, genetic counseling may be beneficial for families with a history of the disorder, providing insights into recurrence risks and reproductive options.

What Is the Latest Research on Kabuki Syndrome?

Ongoing research into the molecular mechanisms underlying Kabuki syndrome holds promise for future therapies. Understanding the specific pathways affected by KMT2D and KDM6A mutations could lead to targeted treatments that address the root causes of the syndrome rather than just the symptoms.