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Infantile Spasms (West Syndrome) - Topic Overview

Infantile spasms (West syndrome) are muscle spasms that affect a child's head, torso, and limbs. Infantile spasms usually begin before the age of 6 months.

  • Most children with infantile spasms have below-normal intelligence. More than half have severe disabilities.
  • Although an exact cause cannot always be found, infantile spasms may be caused by diseases, injuries, or infections that occurred before or during birth.

Infantile spasms are treated with adrenocorticotropic hormone (Acthar) or prednisone. They generally do not respond well to medicines used to treat epilepsy. Vigabatrin (Sabril) may also be an effective treatment for infantile spasms especially when they are caused by a disease called tuberous sclerosis.

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    This information is produced and provided by the National Cancer Institute (NCI). The information in this topic may have changed since it was written. For the most current information, contact the National Cancer Institute via the Internet web site at http:// cancer .gov or call 1-800-4-CANCER.

    WebMD Medical Reference from Healthwise

    Last Updated: March 12, 2014
    This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
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