Probably normal: The septum pellucidum is a normal midline structure in the brain. When this thin membrane is split it forms a cavity. This may represent a normal anatomic variant or a incomplete form of midline developmental anomalies such as dysgenesis of the corpus callosum. Enlarged cavum septum pellucidum have variously been associated with schizophrenia, affective disorder&other neuropsychiatric disorders.
Answered 1/3/2015
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