Suppression of spasms (in response to treatment) | 50 to 90% |
Development of other seizure types | 50 to 70% (intractable in 40 to 50%) |
Evolution into the Lennox-Gastaut syndrome | 20 to 50% |
Learning difficulties (usually moderate or severe) | 70 to 90%* |
Psychiatric (including autistic) dysfunction | 20 to 40%* |
Mortality | 5 to 30% (of which 50% are disease, and 50% treatment-related) |
Reproduced with permission from: Appleton RE. West syndrome: long-term prognosis and social aspects. Brain and Development 2001; 23:688. Copyright © 2001 Elsevier Science.
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