Annals of Indian Academy of Neurology
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Year : 2005  |  Volume : 8  |  Issue : 1  |  Page : 33-35

Asymmetric Depression Of Amplitude In Electroencephalography Leading To A Diagnosis Of Ipsilateral Cerebral Tumor

Correspondence Address:
Sudhir Kumar

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Source of Support: None, Conflict of Interest: None

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Cerebral tumors are not characterized by any specific findings in electroencephalography (EEG) and are conveniently diagnosed with various brain imaging techniques. However, the diagnosis might get delayed in patients presenting with seizures without associated headache or focal neurological deficits. The current report describes a child who presented with recurrent generalized tonic-clonic seizures without any associated clinical symptoms of one-year duration and had no focal deficits on neurological examination. Awake EEG showed a 66% depression in amplitude over the left parietal, posterior temporal and occipital regions, which persisted during sleep. This made us suspect the presence of an underlying structural lesion, which was confirmed by an MRI scan of the brain. The significance of amplitude asymmetry in EEG is discussed and relevant literature reviewed.

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