Panayiotopoulos syndrome is probably genetically determined, though conventional genetic influences may be less important than other mechanisms. Usually, there is no family history of similar seizures, although siblings with Panayiotopoulos syndrome or Panayiotopoulos syndrome and rolandic epilepsy or, less common, Panayiotopoulos syndrome and idiopathic childhood occipital epilepsy of Gastaut have been reported. There is a high prevalence of febrile seizures (about 17%).[11]