Headache at the emergency room: Etiologies, diagnostic usefulness of the ICHD 3 criteria, red and green flags.

Introduction: Non-traumatic headaches account for 0.5 to 4.5% at the emergency department (ED).

Rapidly progressive cognitive impairment with neuropsychiatric symptoms as the initial manifestation of status epilepticus.

The purpose of this article is to describe the clinical and electroencephalographic features of patients diagnosed with non-convulsive status epilepticus (NCSE) with uncommon cognitive and behavioral involvement. We present two cases with sub-acute cognitive impairment and neuropsychiatric disorders (including anxiety and transient behavioral changes) as their first manifestation of NCSE. A neuropsychological profile demonstrated executive dysfunction.