/infantile spasms

infantile spasms

Rare Disease

MONDO:0018097

Also Known As

IESSWest syndromeWest's syndromeinfantile epileptic spasms syndromeinfantile spasmsinfantile spasms syndromeintellectual disability-hypsarrhythmia syndromeX-linked infantile spasm syndromeX-linked infantile spasmstonic spasms with clustering, arrest of psychomotor development and hypsarrhythmia on EEG

Definition

A rare epilepsy syndrome characterized by onset of epileptic spasms in infants between 2 and 12 months of age, and rarely up to 24 months. Infants may have no antecedent history, or a history reflecting the underlying cause. The classical triad of epileptic spasms, hypsarrhythmia and developmental stagnation or regression is historically referred to as West syndrome.