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PubMed This is a summary of 6 peer-reviewed journal articles Updated
Genetics

Physical Traits and the Developmental Journey

At a Glance

Kabuki syndrome is characterized by signature physical traits like distinctive facial features and persistent fetal fingertip pads. Individuals often experience low muscle tone, developmental delays, and anxiety, but make meaningful progress with early, multidisciplinary therapies.

When examining someone with Kabuki syndrome, doctors look for a unique set of physical traits. It is important to remember that these features are diagnostic clues—biological markers that help identify the syndrome—rather than cosmetic problems that need to be “fixed” [1].

Signature Physical Traits

Doctors use a specific set of physical markers, known as dermatoglyphics and dysmorphic features, to recognize the syndrome [2].

  • Distinctive Facial Features: These include long palpebral fissures (the opening between the eyelids), and an eversion (turning outward) of the outer third of the lower eyelid [1]. You may also notice arched, broad eyebrows that are sparse or notched at the outer edges, a short columella (the bridge of tissue between the nostrils), and prominent or “cupped” ears [1].
  • Persistent Fetal Fingertip Pads: This is a classic finding where the small, fleshy bumps on the tips of the fingers—which usually flatten out before a baby is born—remain visible throughout life [3][2].
  • Growth Patterns: Many individuals with Kabuki syndrome have a shorter stature compared to their peers [2].

Developmental Expectations

Every person with Kabuki syndrome follows their own unique path, but there is a common neurodevelopmental profile that can help you and your care team prepare.

The Role of Hypotonia

Infantile hypotonia, or low muscle tone, is a hallmark of the syndrome [1]. In the early months and years, this can make a baby feel “floppy” and may lead to:

  • Delayed Motor Milestones: It may take longer for a child to sit up, crawl, and walk [1].
  • Feeding Challenges: Low muscle tone in the face and throat can sometimes make sucking, swallowing, or transitioning to solid foods more difficult [1].

Cognitive and Behavioral Profile

Most individuals with Kabuki syndrome experience some level of developmental delay or intellectual disability, ranging from mild to moderate [2].

  • Cognitive Strengths and Weaknesses: While every person is different, many show relative strengths in social engagement and verbal memory, but may struggle with visuospatial tasks (such as puzzles, drawing, or navigating complex spaces). For teens and adults, this might impact learning to drive or adjusting to a new workplace layout [4].
  • Anxiety and Behavior: Research shows that individuals with Kabuki syndrome often experience higher levels of anxiety compared to their peers [5]. They may also exhibit behaviors seen in Autism Spectrum Disorder (ASD), such as a strong preference for routine, repetitive movements, or challenges with social communication [6][4].

The Power of Intervention

Because Kabuki syndrome affects multiple systems, a “multidisciplinary” approach to therapy is highly effective, typically beginning as soon as delays are identified.

  1. Physical Therapy (PT): Focuses on strengthening muscles and improving balance to help with walking and coordination.
  2. Occupational Therapy (OT): Helps with fine motor skills and managing sensory sensitivities, which can be useful at any age.
  3. Speech and Language Therapy: Supports both communication and the physical mechanics of eating and swallowing.
  4. Psychomotor or Behavioral Therapy: Can be instrumental in helping manage anxiety and navigate social environments [4].

Development in Kabuki syndrome is an ongoing journey. With consistent support, individuals continue to make meaningful progress at their own pace.

Common questions in this guide

What are the distinctive facial features of Kabuki syndrome?
Doctors look for specific facial features, including long openings between the eyelids, an outward turning of the lower eyelid, arched and broad eyebrows, a short bridge between the nostrils, and prominent or cupped ears.
How does low muscle tone (hypotonia) affect babies with Kabuki syndrome?
Infantile hypotonia, or low muscle tone, is a hallmark of the syndrome that can make babies feel 'floppy.' This often leads to delayed motor milestones, like sitting or walking, and can cause difficulties with sucking, swallowing, and transitioning to solid foods.
Are developmental delays common in Kabuki syndrome?
Yes, most individuals experience mild to moderate developmental delays or intellectual disability. While they often have strengths in verbal memory and social engagement, many struggle with visuospatial tasks like puzzles or navigating new spaces.
What therapies are recommended for a child with Kabuki syndrome?
A multidisciplinary approach is highly effective, typically including physical, occupational, and speech therapy. Behavioral therapy is also frequently used to help manage anxiety and navigate social environments.
Does Kabuki syndrome affect behavior and cause anxiety?
Individuals with Kabuki syndrome often experience higher levels of anxiety than their peers and may exhibit behaviors associated with Autism Spectrum Disorder. These can include a preference for routine, repetitive movements, and challenges with social communication.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.What is the current plan for monitoring developmental or functional milestones?
  2. 2.How does hypotonia (low muscle tone) affect feeding, speech, or stamina?
  3. 3.Can you recommend a specialist familiar with the anxiety and neurobehavioral profile of Kabuki syndrome?
  4. 4.Should we be using specific equipment (like orthotics or adaptive seating) for support?

Questions For You

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References

References (6)
  1. 1

    Kabuki syndrome: international consensus diagnostic criteria.

    Adam MP, Banka S, Bjornsson HT, et al.

    Journal of medical genetics 2019; (56(2)):89-95 doi:10.1136/jmedgenet-2018-105625.

    PMID: 30514738
  2. 2

    Kabuki Syndrome with Cleft Palate.

    Paik JM, Lim SY

    Archives of plastic surgery 2016; (43(5)):474-6 doi:10.5999/aps.2016.43.5.474.

    PMID: 27689058
  3. 3

    The First Case Report of Kabuki Syndrome from the National Iranian Registry of Primary Immunodeficiencies.

    Safarirad M, Ganji AA, Fekrvand S, et al.

    Endocrine, metabolic & immune disorders drug targets 2021; (21(11)):2099-2103 doi:10.2174/1871530321666210114153920.

    PMID: 33459250
  4. 4

    Dohsa-hou intervention for reciprocal interpersonal interaction for a girl with Kabuki syndrome and autism spectrum disorder.

    Kawano J, Fujino H

    Clinical case reports 2021; (9(6)):e04296 doi:10.1002/ccr3.4296.

    PMID: 34194798
  5. 5

    Neurobehavioral phenotype of Kabuki syndrome: Anxiety is a common feature.

    Kalinousky AJ, Rapp T, Hijazi H, et al.

    Frontiers in genetics 2022; (13()):1007046 doi:10.3389/fgene.2022.1007046.

    PMID: 36276984
  6. 6

    Deficiency of KMT2D causes autistic-like behavior in mice and zebrafish.

    Shangguan H, Huang J, Wei X, et al.

    Communications biology 2025; (8(1)):1311 doi:10.1038/s42003-025-08635-2.

    PMID: 40883562

This page is for educational purposes only and provides general information about the physical and developmental traits of Kabuki syndrome. It does not replace professional medical advice, diagnosis, or customized therapy plans from your healthcare team.

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