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Infantile spasm used to be treated with ACTH
but new medicine like Vigabatrin is proved best drug these days. Better to consult your Paediatrician in this. There may be behavioral defect which can affect him. Prognosis cannot be commented as some children with other diseases along with West syndrome
have worse prognosis than normal children with West syndrome. Around half of children will develop cognitive problems and some will develop seizures as well. Best to consult your Paediatrician for individual risk scoring and counselling
in this regard.