GAD2 and acrodermatitis enteropathica: <h4>Objective</h4>To present a long-lasting misdiagnosed case of anti-GAD65 autoimmune encephalitis (AE) and promote the early identification of reversible psychotic symptoms in AE.<h4>Methods</h4>The case report was generated through detailed assessment of clinical characteristics, cerebral magnetic resonance images, and laboratory results.