Abstract
Epilepsy-associated psychoses are poorly understood, and management is focused on treating epilepsy. Chronic, interictal psychosis that persists despite seizure control is typically treated with antipsychotics. Whether resection of a mesial temporal lobe lesion may improve interictal psychotic symptoms that persist despite seizure control remains unknown. In a 52-year-old man with well-controlled epilepsy and persistent comorbid psychosis, brain magnetic resonance imaging (MRI) revealed an infiltrative, intraaxial, T2 fluid-attenuated inversion recovery intense mass of the left amygdala. The patient received an amygdalectomy for oncological diagnosis and surgical treatment of a presumed low-grade glioma. Pathology was ganglioglioma, World Health Organization grade I. Postoperatively, the patient reported immediate resolution of auditory hallucinations. Patient has remained seizure-free on 2 antiepileptic drugs and no antipsychotic pharmacotherapy and reported lasting improvement in his psychotic symptoms. This report discusses improvement of psychosis symptoms after resection of an amygdalar glioma, independent of seizure outcome. This case supports a role of the amygdala in psychopathology and suggests that low-grade gliomas of the limbic system may represent, at minimum, partially reversible etiology of psychotic symptoms.
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