Health Information

Aicardi syndrome

Aicardi syndrome


Aicardi syndrome is a rare disorder in which the structure that connects the two sides of the brain (called the corpus callosum) is partly or completely missing. Nearly all known cases of Aicardi syndrome occur in people with no history of the disorder in their family (sporadic).

The cause of Aicardi syndrome is unknown at this time. In some cases, experts believe it may be a result of a gene defect on the X chromosome.

The disorder affects only girls.

I Would Like to Learn About:

  • Causes

    The cause of Aicardi syndrome is unknown at this time. In some cases, experts believe it may be a result of a gene defect on the X chromosome.

    The disorder affects only girls.

  • Symptoms

    Symptoms usually start when the child is between ages 3 and 5 months. The condition causes jerking (infantile spasms), a type of childhood seizure.

    Aicardi syndrome may occur with other brain defects.

    Other symptoms may include:

    • Coloboma (cat's eye)
    • Intellectual disability
    • Smaller-than-normal eyes (microphthalmia)
  • Exams and Tests

    Children are diagnosed with Aicardi syndrome if they meet the following criteria:

    • Corpus callosum that is partly or completely missing
    • Female sex
    • Seizures (typically beginning as infantile spasms)
    • Sores on the retina (retinal lesions) or optic nerve

    In rare cases, one of these features may be missing (especially lack of development of the corpus callosum).

    Tests to diagnose Aicardi syndrome include:

    • CT scan of the head
    • EEG
    • Eye exam
    • MRI

    Other procedures and tests may be done, depending on the person.

  • Treatment

    Treatment is supportive. It involves managing seizures and any other health concerns, and using programs to help the family and child cope with delays in development.

  • Support Groups

    Aicardi Syndrome Foundation - www.aicardisyndrome.org

    National Organization for Rare Disorders (NORD) - www.rarediseases.org

  • Outlook (Prognosis)

    The outlook depends on how severe the symptoms are and what other health conditions are present.

    Nearly all children with this syndrome have severe learning difficulties and remain completely dependent on others. However, a few have some language abilities and some can walk on their own or with support. Vision varies from normal to blind.

  • Possible Complications

    Complications depend on the severity of symptoms.

  • When to Contact a Medical Professional

    Call your health care provider if your child has symptoms of Aicardi syndrome. Seek emergency care if the infant is having spasms or a seizure.

Related Information



Glasmacher MA, Sutton Vr, Hopkins B, Eble T, Lewis RA, Park Parsons D, et al. Phenotype and management of Aicardi syndrome: new findings from a survey of 69 children. J Child Neurol. 2007;22:176-184.

Kinsman SL, Johnston MV. Agenesis of the corpus callosum. In: Kliegman RM, Behrman RE, Jenson HB, Stanton BF, eds. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, PA: Elsevier Saunders; 2011:chap 585.8.


Review Date: 8/30/2014  

Reviewed By: Neil K. Kaneshiro, MD, MHA, Clinical Assistant Professor of Pediatrics, University of Washington School of Medicine, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.


A.D.A.M. content is best viewed in IE9 or above, Firefox and Google Chrome browser.