Genetic cause is
Usually sporadic, possibly due to mosaicism-some, but not all cells have gene abnormalities.
Eeg's to look for seizures (~ 70%). Neuromaging to monitor growth of hemangiomas, blood vessel abnormalities of brain & brain coverings. Vision
exams for glaucoma
(30-48%) & hemianopia (decreased vision in one eye
tests for intellectual disability (~40%).See http://www.Sturge-weber.Org/resources/about.