Yes, you most certainly can have both. In some cases an adolescent will outgrow the petit mal seizures. In other cases, the petit mal will be replaced by grand mal seizures. There are also patients that will have both. In these cases what happens is the grand mal is preceded by a series of petit mal seizures. Very often what happens is the patient wakes up and for whatever reason (sleep deprivation, alcohol withdrawl, etc) begins to have petit mal after petit mal and then a grand mal seizure.