West Syndrome synonyms

West Syndrome is most commonly referred to as infantile spasms or epileptic spasms, though it is clinically defined by the triad of infantile spasms, hypsarrhythmia on an EEG, and developmental arrest. Because the condition was first described by Dr. William James West in 1841, it is frequently cited under various historical and clinical labels across international medical literature.

What are the common synonyms and names for West Syndrome?

While West Syndrome is the standard medical term, you will frequently encounter it under the following labels in medical records and research databases:

• Infantile Spasms (IS): The most common clinical term used by pediatric neurologists.


• Epileptic Spasms: The preferred term in modern classification systems to describe the specific seizure type.


• X-linked Infantile Spasms Syndrome (if associated with specific genetic mutations like ARX).


• Massive Myoclonic Jerks: An older, historical term rarely used in modern clinical practice.

Why does West Syndrome have so many different names?

The variety of names for West Syndrome stems from a combination of historical eponyms and evolving diagnostic criteria. Early literature often described the condition based on the physical appearance of the seizures, leading to terms like "salaam convulsions" or "jackknife seizures." As our understanding of the underlying neurobiology improved, medical professionals shifted toward West Syndrome as a syndromic diagnosis, while "epileptic spasms" became the preferred term for the specific seizure semiology under the International League Against Epilepsy (ILAE) guidelines.

How is West Syndrome classified in official databases?

Standardized medical systems ensure consistency for clinicians and researchers tracking West Syndrome:

1. Orphanet: Listed as ORPHA:900.


2. OMIM: Cataloged under #308350 (often linked to X-linked forms).


3. ICD-10/11: Typically coded under G40.4 (other generalized epilepsy and epileptic syndromes).

Next steps

• Consult a board-certified pediatric neurologist or epileptologist to confirm the specific diagnosis and current treatment protocols for West Syndrome.


• Connect with the 7 members of the West Syndrome community on DiseaseMaps.org to share experiences and find peer support.


• Request copies of your child’s EEG reports to verify if "hypsarrhythmia" is documented, as this is a key diagnostic marker for West Syndrome.

Medical disclaimer: This content is for informational purposes only and does not constitute professional medical advice, diagnosis, or treatment.

References

• NIH Genetic and Rare Diseases Information Center (GARD): Infantile Spasms.


• Orphanet: West Syndrome (ORPHA:900).


• Online Mendelian Inheritance in Man (OMIM): #308350.


• International League Against Epilepsy (ILAE): Classification of the Epilepsies.