Photosensitivity in Dravet syndrome is under-recognized and related to prognosis

Dravet syndrome (DS) is a severe epilepsy syndrome caused by heterozygous SCN1A mutations in at least 70% of cases (Depienne et al., 2009). Onset is in the first year of life with febrile or afebrile, generalized or unilateral seizures. Later on various other seizure types appear and psychomotor development slows. Eventually this results in intellectual disability, motor problems and therapy resistant epilepsy in the majority of cases (Dravet et al., 1992, 2005). Photosensitivity has been noticed as a characteristic of DS, since the first description of the syndrome by Charlotte Dravet in 1978 (Dravet, 1978).

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