Neurologic Features
Seizures, migraine headaches and developmental delays are common in SWS. Seizures in SWS are often on one side or area of the body (focal) but may also involve the whole body (generalized). Usually the seizures begin in the first year or two of life, but may start later. The seizures are often triggered by fever or illness. Stroke-like events may also occur with the sudden development of weakness on one side of the body (hemiparesis) or difficulty seeing to one side (visual field cuts). Headaches and migraines are common and may be associated with seizures or stroke-like episodes. Developmental delay, including delays in speech, walking and fine-motor development may be present from birth or can develop in the first year or so of life. Learning problems and mental retardation can also be seen.

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