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nci:P97
<n0:ComplexDefinition xmlns:n0="http://ncicb.nci.nih.gov/xml/owl/EVS/ComplexProperties.xsd#"><n0:def-definition>Malignant neoplasms which occur in the brain, spinal cord, or meninges of children. Brainstem gliomas, medulloblastomas, ependymomas, and certain pineal tumors are relatively common primary malignant tumors of the CNS in children.</n0:def-definition><n0:def-source>NCI</n0:def-source></n0:ComplexDefinition>