title: A neuroepithelial tumor showing combined histological features of dysembryoplastic neuroepithelial tumor and pleomorphic xanthoastrocytoma--a case report and review of the literature.
abstract: A neuroepithelial tumor showing combined histological features of dysembryoplastic neuroepithelial tumor (DNT) and pleomorphic xanthoastrocytoma (PXA) is described. The patient was a 60-year-old male with a long-standing temporal lobe tumor and seizures. After a long, dormant period, the tumor, which had been localized in the left uncus, re-grew rapidly and extended into the subarachnoidal space and brain stem. The post-operative specimens disclosed two distinct components: an intra-cortical, cystic lesion containing mucinous materials and an extra-cortical, nodular lesion involving the leptomeninges. The former contained oligodendroglia-like small, round cells placed along axonal processes, plus mature neurons situated against mucinous materials (DNT-like component, WHO Grade I). The latter contained spindle and/or pleomorphic cells expressing glial fibrillary acidic protein, having bizarre nuclei and atypical mitotic figures. A reticulin network was developed among the tumor cells (PXA-like component, WHO Grade III). This case illustrates an unusual composite brain tumor, combined DNT and PXA.
authors: Department of Pathology, Saitama Medical University, Saitama, Japan. ishizawa@saitama-med.ac.jp
authors: K
authors: K
authors: Ishizawa
authors: S
authors: S
authors: Terao
authors: K
authors: K
authors: Kobayashi
authors: K
authors: K
authors: Yoshida
authors: T
authors: T
authors: Hirose
mesh_terms: D001254:Astrocytoma / Q000473:pathology* / Q000601:surgery; D001932:Brain Neoplasms / Q000473:pathology* / Q000601:surgery; D006801:Humans; D008297:Male; D008875:Middle Aged; D018302:Neoplasms, Neuroepithelial / Q000473:pathology* / Q000601:surgery; D013702:Temporal Lobe / Q000473:pathology* / Q000601:surgery; D013724:Teratoma / Q000473:pathology* / Q000601:surgery; D016896:Treatment Outcome