What Is Kabuki Syndrome? Symptoms, Causes, and Treatment
Updated: 3 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026
Quick Answer: What Is Kabuki Syndrome?
Kabuki syndrome is a congenital genetic condition affecting facial development, the musculoskeletal system and internal organs, caused by a change in the KMT2D or KDM6A gene. [1] [2] Key signs include arched eyebrows, long eyelid openings, scoliosis and mild to moderate intellectual disability. [1] Genetic testing confirms it, and management uses physical, occupational and speech therapies. [1]
What the research says
Experts agreed on how to diagnose Kabuki syndrome, with or without a gene result. An international consensus group reported that about 70% of patients have a pathogenic variant in KMT2D or KDM6A. A definitive diagnosis can be made at any age when a person has a history of infantile hypotonia plus developmental delay and/or intellectual disability, together with either a pathogenic variant or typical facial features such as long eyelid openings with arched, broad eyebrows (Adam et al., J Med Genet, 2019 [3]).
Immune problems are common. In a series of 18 people with Kabuki syndrome, 11 (61%) had recurrent infections, 3 (17%) had autoimmune disease, 6 (33%) had low CD4 T-cell counts, and 8 (44%) had a humoral (antibody) deficiency (Comel et al., J Clin Immunol, 2024 [4]).
About half of children in one heart-center review had a congenital heart defect. Among 37 children with Kabuki syndrome seen over 25 years at one center, 18 (49%) had congenital heart disease, most often bicuspid aortic valve, hypoplastic left heart syndrome, or coarctation of the aorta. Deaths were concentrated in children with complex heart anatomy, and no late deaths were seen in those who survived the early postoperative period. This was a single-center study, so results may not apply to everyone (Camacho et al., World J Pediatr Congenit Heart Surg, 2026 [5]).
Key Takeaways: Kabuki Syndrome Facts
Feature | Details |
Definition | Rare genetic disorder affecting facial features, bones, and organs [1] |
Alternative Names | KMS, Niikawa-Kuroki syndrome [1] |
Primary Causes | Genetic variants in KMT2D (up to about 75% of cases) or KDM6A (a few percent of cases) [1] |
Key Symptoms | Arched eyebrows, long palpebral fissures, skeletal issues, intellectual disability [1] |
Diagnosis | Physical exam, family history, and confirmatory genetic testing [1] |
Management | Multidisciplinary care (cardiology, neurology, endocrinology, therapies) [1] |
Prognosis | Varies by severity; some adults appear to have a normal lifespan with support [1] |
What is Kabuki syndrome?
Kabuki syndrome is a rare genetic condition that can affect many different parts of a child's body. Most children with this condition develop distinctive facial characteristics, minor skeletal abnormalities, intellectual disability, and growth problems after birth. [1] The name "Kabuki" was coined by Japanese scientists in 1981 because the facial features of many children with the condition resembled the stage makeup worn by performers in traditional Japanese Kabuki theater. [1] [2] The incidence is estimated at between 1 in 32,000 and 1 in 86,000 people. [2]
While the specific features and severity vary widely from one individual to another, the condition is present from birth (congenital). [1] It is a multisystem disorder, meaning it can impact everything from the heart and kidneys to the brain and musculoskeletal system. [2]
Genetic Basis and Types
The condition is divided into two primary types based on the specific gene affected:
These genes provide instructions for making enzymes that control gene activity by altering proteins called histones. [1] [2] When these enzymes are absent or dysfunctional, essential gene activation for development cannot occur, leading to the characteristics associated with the syndrome. [1] Most cases occur as a new change in the affected child, with no family history, although a person with Kabuki syndrome can pass it on. [2]
What are the symptoms and causes of Kabuki syndrome?
Symptoms of Kabuki syndrome may not be immediately obvious at birth and can take several years to fully manifest. [1] The presentation is highly variable, but several hallmark characteristics are commonly observed.
Hallmark Characteristics
Distinctive Facial Features: These often include arched, broad eyebrows with sparse hair at the ends, abnormally long openings between the eyelids (palpebral fissures), a flat tip of the nose, and large, cupped ears. [1]
Skeletal Abnormalities: Common issues include abnormalities in the spine (scoliosis), short fingers or toes (brachydactyly), and a bent fifth finger (clinodactyly). [1]
Neurological and Developmental Features: Children may experience mild to moderate intellectual disability, speech delays, weak muscle tone (hypotonia), and sometimes seizures. [1]
Growth and Gastrointestinal Issues: While birth weight is often normal, growth delays frequently emerge by 12 months. [1] Feeding or swallowing difficulties are also common. [1]
Associated Medical Conditions
Because Kabuki syndrome is a multisystem disorder, it can also lead to:
Congenital Heart Defects: Present in a significant portion of cases. [1] [5]
Organ Issues: Problems with the kidneys and reproductive organs. [1]
Cleft Lip or Palate: Structural abnormalities in the mouth. [1]
Immune System Challenges: An increased risk of infections or the development of autoimmune disorders. [1] [4]
Sensory Issues: Hearing loss, crossed eyes (strabismus), or drooping eyelids (ptosis). [1]
How is Kabuki syndrome diagnosed and managed?
Early diagnosis is crucial for implementing interventions that can improve a child's developmental trajectory.
The Diagnostic Process
Healthcare providers typically begin with a thorough medical history and physical examination, looking for the hallmark facial and skeletal signs. [1] Genetic testing is the standard way to confirm the diagnosis, using a blood sample to identify variants in the KMT2D or KDM6A genes. [1] A minority of people with Kabuki syndrome have no variant found in either gene. [1] [2] In those cases, doctors may use a specialized epigenetic signature test, or the diagnosis may be based on clinical observations. [2] [3]
A Multidisciplinary Treatment Approach
Since there is no cure, treatment focuses on managing symptoms and preventing complications. [1] [2] A team of specialists is often required:
Therapies: Physical therapy for muscle strength, occupational therapy for fine motor skills, and speech therapy for language development. [1]
Early Intervention: Specialized education and supportive services to boost cognitive development. [1]
Medical Management: Medications for seizures or gastrointestinal reflux, and hearing aids or ear tubes for hearing loss. [1]
Growth Support: Supplemental growth hormone therapy may be used for those with growth deficiencies. [1] [2]
Surgery: Necessary for correcting heart defects, scoliosis, or cleft lip/palate. [1]
What is the outlook for Kabuki syndrome, and what support is available?
The prognosis for Kabuki syndrome depends largely on the severity of the symptoms and the involvement of critical organs like the heart.
Life Expectancy and Independence
While research is limited due to the rarity of the condition, some adults with Kabuki syndrome appear to have a normal lifespan. [1] With proper support, some are able to manage day-to-day life and hold part-time jobs, though most continue to require some level of supportive care throughout their lives. [1]
Caring for a Child with Kabuki Syndrome
Learning that a child has a rare genetic condition can be overwhelming. Families are encouraged to:
Conclusion
Kabuki syndrome is a complex, multisystem disorder that requires lifelong management and a dedicated team of caregivers. From its distinctive facial features to the underlying genetic causes, understanding the condition is the first step toward providing the best possible care. With early intervention and a comprehensive treatment plan, children with Kabuki syndrome can overcome many challenges and lead fulfilling lives.
Explaining rare genetic conditions to families and students is easier with visual aids. Explore our infographic templates to create professional medical illustrations that clarify genetic pathways, symptom checklists, and treatment roadmaps.
Frequently Asked Questions
What is Kabuki syndrome?
Why is it called Kabuki?
The facial features of many affected children resembled the makeup worn in traditional Japanese Kabuki theater. [1] [2]
Is Kabuki syndrome common?
No. The incidence is estimated at between 1 in 32,000 and 1 in 86,000 people. [2]
What causes Kabuki syndrome?
Variants in the KMT2D or KDM6A genes. [1]
Is it inherited?
Most cases occur as a new change in the child with no family history, but a person with Kabuki syndrome can pass it on. [2] For KMT2D variants, the chance is 50% with each pregnancy. [2]
What is Kabuki Syndrome Type 1?
The type caused by a variant in the KMT2D gene, which is the most common cause. [1]
What is Kabuki Syndrome Type 2?
The type caused by a variant in the KDM6A gene. [1]
What are the hallmark facial features?
Arched eyebrows, long eyelid openings, a flat nose tip, and cupped ears. [1]
Does it affect intelligence?
Children may have mild to moderate intellectual disability. [1] Severe disability is rare, and some children have none. [2]
Can it cause growth problems?
Yes, growth delays often appear by 12 months of age. [1]
Are heart defects common?
Yes, congenital heart defects occur in many cases. [1] [5] Ask your care team about a heart evaluation.
What skeletal issues are common?
Scoliosis, short fingers, and bent pinky fingers. [1]
Can it cause hearing loss?
Yes, hearing issues are a known symptom. [1]
Does it affect the immune system?
Yes. It can increase the risk of infections and autoimmune disorders [1] [4], and doctors usually check immune function after diagnosis. [2]
How is it diagnosed?
Through a physical exam, family history, and confirmatory genetic testing. [1]
Can it be detected before birth?
Prenatal genetic testing is possible when a family's specific variant is already known.
Is there a cure?
What therapies help?
Physical, occupational, and speech therapies. [1]
What is hypotonia?
Weak muscle tone, which is common in Kabuki syndrome. [1]
Can it cause seizures?
Yes, some children with the syndrome experience seizures. [1]
Is growth hormone used?
Yes, it can help treat growth hormone deficiency and short stature. [2]
What specialists are needed?
Cardiologists, neurologists, endocrinologists, and others, depending on the symptoms. [1]
What is the life expectancy?
Some adults appear to have a normal lifespan, but research is limited because the condition is rare. [1]
Can adults with Kabuki syndrome work?
Some adults can manage day-to-day life and hold part-time jobs, usually with supportive care. [1]
Does it affect the kidneys?
What is a palpebral fissure?
What is clinodactyly?
A bent fifth finger, a common skeletal sign. [1]
Can it cause cleft palate?
Yes, cleft lip and palate are possible symptoms. [1]
Does it affect dental health?
Yes, widely spaced teeth and other dental differences have been reported. [1]
Is it present from birth?
Yes, it is a congenital condition, although some signs take years to appear. [1]
Can symptoms appear later?
Yes, some features may take several years to become apparent. [1]
What is sensory integration therapy?
Are there support groups?
Yes, many organizations support families affected by rare genetic conditions, including groups dedicated to Kabuki syndrome that are listed by NORD. [2]
Does it affect the reproductive organs?
Yes, abnormalities such as undescended testicles in some boys and early breast development in some girls can occur. [2]
Can it cause obesity?
Yes, weight gain can become a concern in the teen and adult years. [1]
What is the KMT2D gene?
The gene most often linked to Kabuki syndrome. [1]
What are histones?
Proteins that help DNA maintain its shape in chromosomes. [1]
How do enzymes affect genes?
They control gene activity by altering histones. [1]
Can genetic testing miss Kabuki syndrome?
Yes. A minority of people with Kabuki syndrome have no variant found in KMT2D or KDM6A. In that case, doctors may use an epigenetic signature test or diagnose based on clinical features. [2]
Is physical therapy important?
Yes, to help strengthen muscles and improve mobility. [1]
Does it cause speech delays?
Yes, speech delays are common [2], and many children benefit from speech therapy.
What is Niikawa-Kuroki syndrome?
Another name for Kabuki syndrome, after the two Japanese scientists who first described it. [1]
Can it cause early puberty?
Are there clinical trials?
Research is ongoing, but there is currently no FDA-approved targeted treatment for Kabuki syndrome. [2]
How can parents help?
By coordinating multidisciplinary care and seeking early intervention.
Does it affect vision?
Yes, issues like crossed eyes or drooping eyelids can occur. [1]
What is brachydactyly?
A condition of having short fingers and toes. [1]
Can it cause feeding issues?
Yes. Some infants need thickened feeds, and a few with severe feeding difficulties need a feeding tube. [1] [2]
Is it a progressive disease?
It is present from birth, but some features become noticeable only over several years, and care needs continue throughout life.
Where can I find more information?
A genetic counselor, your child's care team, and NORD are good starting points. [2]
Related Reading
References
Cleveland Clinic. Kabuki Syndrome: Symptoms, Causes & Treatment. Cleveland Clinic. Last updated May 8, 2025. https://my.clevelandclinic.org/health/diseases/24095-kabuki-syndrome
National Organization for Rare Disorders (NORD). Kabuki Syndrome. NORD. Last updated July 6, 2023. https://rarediseases.org/rare-diseases/kabuki-syndrome/
Adam MP, Banka S, Bjornsson HT, et al. Kabuki syndrome: international consensus diagnostic criteria. J Med Genet. 2019;56(2):89-95. PMID 30514738. https://doi.org/10.1136/jmedgenet-2018-105625
Comel M, Saad N, Sil D, et al. Abnormal immune profile in individuals with Kabuki syndrome. J Clin Immunol. 2024;45(1):7. PMID 39264387. https://doi.org/10.1007/s10875-024-01796-5
Camacho M, Yerebakan C, McConnell P, et al. Congenital heart defects in Kabuki syndrome: perioperative and long-term outcomes from a 25-year single-center experience. World J Pediatr Congenit Heart Surg. 2026;21501351261477060. PMID 42742415. https://doi.org/10.1177/21501351261477060
Disclaimer
This information is for educational purposes only and does not constitute medical advice. Always seek the counsel of a qualified healthcare professional regarding any medical condition or emergency. If you are experiencing a life-threatening emergency, call 911 or your local emergency services immediately.
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