Sleep-deprived electroencephalography, a forgotten investigation in psychiatry; a case series.

Objectives: Many patients with psychiatric disorders may have epileptic disorders; however, clinical diagnosis without imaging investigation may result in misdiagnosis and thus resistance to treatment. We investigated electroencephalography (EEG) abnormalities in the patients with psychiatric disorders referred to us with treatment resistance.

Methods: In this case series study, nine patients with mood and psychotic symptoms who were referred to us at Belmont Private Hospital, Australia, from August 2018 to July 2020, were evaluated.