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PubMed This is a summary of 34 peer-reviewed journal articles Updated
Neurology

Christianson Syndrome: A Comprehensive Guide for Parents and Caregivers

At a Glance

Christianson Syndrome is a rare X-linked genetic condition caused by an SLC9A6 mutation. It mainly affects boys, causing profound intellectual disability, epilepsy, absence of speech, and high pain tolerance, requiring extreme caregiver vigilance and lifelong multidisciplinary support.

Receiving a diagnosis of Christianson Syndrome (CS) for your child can be overwhelming. As a parent, you are likely navigating complex medical terms, emotional stress, and a flood of new information [1]. This guide is designed to empower you with evidence-based knowledge about your child’s condition, helping you build the right care team and advocate effectively.

Christianson Syndrome is a rare, X-linked genetic disorder caused by a mutation in the SLC9A6 gene [2]. It primarily affects males and is characterized by profound intellectual disability, nonverbal status, difficult-to-control epilepsy, and movement challenges like ataxia [3][4]. While the core features are present early in life, the condition can progress, meaning that continuous monitoring is essential [5].

One of the most important aspects of CS is its unique sensory profile: many children have an unusually high tolerance for pain (pain hyposensitivity) combined with a strong dislike of light touch (touch aversion) [6]. This requires caregivers to remain extremely vigilant for injuries or illnesses that the child cannot communicate [7]. Additionally, while females with the mutation were once thought to be unaffected carriers, we now know they can experience cognitive and late-in-life neurological symptoms [8][9].

Explore the pages below to learn more:

01

Understanding the Symptoms and Clinical Journey of Christianson Syndrome

Learn about Christianson Syndrome (CS) symptoms, from early signs like microcephaly and epilepsy to long-term disease progression and sensory challenges.

02

Genetics, Inheritance, and the Health of Female Carriers

Learn about Christianson Syndrome genetics, SLC9A6 mutations, and X-linked inheritance. Understand the specific health risks and symptoms for female carriers.

03

Navigating Neurological and Orthopedic Complications

Learn about neurological and orthopedic complications in Christianson syndrome, including ESES seizures, cerebellar degeneration, and spinal instability.

04

Building Your Care Team and Treatment Plan

Learn how to build a multidisciplinary care team for Christianson Syndrome. Understand recommended monitoring, specialist roles, and symptom management.

Common questions in this guide

What causes Christianson Syndrome?
Christianson Syndrome is caused by a mutation in the SLC9A6 gene located on the X chromosome. It is a rare genetic disorder that primarily affects males, though female carriers can also experience symptoms.
What are the most common symptoms of Christianson Syndrome?
Children with Christianson Syndrome typically experience profound intellectual disability, remain nonverbal, and develop difficult-to-control epilepsy. They also frequently face movement challenges like ataxia, which affects coordination and balance.
How does Christianson Syndrome affect a child's sensory processing?
Many children with this condition have an unusually high tolerance for pain and a strong dislike of light touch. Because they cannot communicate verbally and may not react to pain, caregivers must be extremely vigilant in checking for injuries or hidden illnesses.
Can females be affected by Christianson Syndrome?
Yes, females who carry the SLC9A6 gene mutation can be affected. While previously thought to be unaffected carriers, it is now known that they can experience cognitive challenges and develop neurological symptoms later in life.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.Are you familiar with the specific progression and sensory profiles associated with Christianson Syndrome?
  2. 2.Who should be our primary point of contact for coordinating my child's multidisciplinary care?
  3. 3.What are the most urgent next steps now that we have this diagnosis?

Questions For You

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References

References (9)
  1. 1

    Christianson Syndrome Family Experiences: Results From Caregiver Interviews.

    St Pierre DG, Best CR, Elacio J, et al.

    Journal of child neurology 2025; (40(8)):603-611 doi:10.1177/08830738251327619.

    PMID: 40170533
  2. 2

    A novel splicing mutation in SLC9A6 in a boy with Christianson syndrome.

    Ieda D, Hori I, Nakamura Y, et al.

    Human genome variation 2019; (6()):15 doi:10.1038/s41439-019-0046-x.

    PMID: 30937176
  3. 3

    Electrical status epilepticus in sleep, a constitutive feature of Christianson syndrome?

    Mathieu ML, de Bellescize J, Till M, et al.

    European journal of paediatric neurology : EJPN : official journal of the European Paediatric Neurology Society 2018; (22(6)):1124-1132 doi:10.1016/j.ejpn.2018.07.004.

    PMID: 30126759
  4. 4

    Christianson syndrome across the lifespan: genetic mutations and longitudinal study in children, adolescents, and adults.

    Kavanaugh BC, Elacio J, Best CR, et al.

    Journal of medical genetics 2024; (61(11)):1031-1039 doi:10.1136/jmg-2024-109973.

    PMID: 39237363
  5. 5

    Christianson Syndrome across the Lifespan: An International Longitudinal Study in Children, Adolescents, and Adults.

    Kavanaugh BC, Elacio J, Best CR, et al.

    medRxiv : the preprint server for health sciences 2023; doi:10.1101/2023.11.11.23298218.

    PMID: 37987014
  6. 6

    Pain experience of children with Christianson syndrome.

    Premachandran S, Ocay DD, Beaulieu C, et al.

    Pain 2025; (166(7)):1610-1621 doi:10.1097/j.pain.0000000000003522.

    PMID: 39945731
  7. 7

    Loss of SLC9A6/NHE6 impairs nociception in a mouse model of Christianson syndrome.

    Petitjean H, Fatima T, Mouchbahani-Constance S, et al.

    Pain 2020; (161(11)):2619-2628 doi:10.1097/j.pain.0000000000001961.

    PMID: 32569089
  8. 8

    The expanding phenotypic spectrum of female SLC9A6 mutation carriers: a case series and review of the literature.

    Sinajon P, Verbaan D, So J

    Human genetics 2016; (135(8)):841-50 doi:10.1007/s00439-016-1675-5.

    PMID: 27142213
  9. 9

    Novel SLC9A6 Variation in Female Carriers With Intellectual Disability and Atypical Parkinsonism.

    Nan H, Kim YJ, Tsuchiya M, et al.

    Neurology. Genetics 2022; (8(1)):e651 doi:10.1212/NXG.0000000000000651.

    PMID: 35198730

This guide provides educational information about Christianson Syndrome for parents and caregivers. It is not a substitute for professional medical advice or consultation with your child's neurology and genetics team.

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