title: Development of a pilocytic astrocytoma in a dysembryoplastic neuroepithelial tumor. Case report.
abstract: Dysembryoplastic neuroepithelial tumors (DNETs) are benign supratentorial tumors based in the cerebral cortex. They usually are found in children and young adults with seizures that tend to become refractory to medical treatment. In the vast majority of cases resection results in good seizure control, and adjuvant therapy is not required. When tumors thought to be DNETs are not resected due to their proximity to eloquent cortex, lack of change in the clinical and neuroimaging features over time supports the diagnosis of DNET. The authors report on a patient in whom a pilocytic astrocytoma developed within a DNET, raising questions regarding the classification of these lesions and the need for lifelong clinical and imaging surveillance. This paper adds to the growing body of literature about the biological behavior of these lesions.
authors.affiliation: Department of Neurosurgery, Royal Children's Hospital, Melbourne, Victoria, Australia.
authors.forename: Vivek
authors.initials: V
authors.lastname: Josan
authors.forename: Paul
authors.initials: P
authors.lastname: Smith
authors.forename: Andrew
authors.initials: A
authors.lastname: Kornberg
authors.forename: Christian
authors.initials: C
authors.lastname: Rickert
authors.forename: Wirginia
authors.initials: W
authors.lastname: Maixner
mesh_terms: D001254:Astrocytoma / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D001932:Brain Neoplasms / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D002540:Cerebral Cortex; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D016609:Neoplasms, Second Primary / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D018242:Neuroectodermal Tumors, Primitive / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D038361:Neuronavigation; D019635:Neurosurgical Procedures; D012640:Seizures / Q000209:etiology; D013238:Stereotaxic Techniques