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Hemiparkinsonism due to frontal meningioma.

We describe a case with right hemiparkinsonism due to a frontal meningioma with surrounding edema compressing the basal ganglia. The initial diagnosis of idiopathic Parkinson's disease (PD) was made in another institution on the basis of the positive family history, the clinical symptoms and the asymmetric reduction of striatal tracer binding in a single photon emission computed tomography study for the dopamine transporter. The symptoms of parkinsonism resolved completely shortly after surgery for removal of the tumor. This case points to the significance of structural neuroimaging in the evaluation of parkinsonism even in cases that fulfill all the necessary clinical criteria for idiopathic PD.