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Lesions of the gangliocapsular nuclei are associated with multiple neuropsychiatric functions, and their disease presents with a variety of presentations. Purely psychiatric presentations are known, and among them, mood disorders and psychosis may be likely. Here, we describe a case series with three independent patients presenting with psychiatric symptoms attributable to basal ganglia lesions, but with three different presentations – mania, depression, and nonaffective psychosis. It is important to rule out basal ganglia lesions in all cases of psychiatric presentations where an organic etiology is suspected.