Bone Neoplasms ; pathology ; Cerebellum ; pathology ; Humans ; Neurocytoma ; pathology ; Petrous Bone ; pathology

Brain Neoplasms ; pathology ; Humans ; Neurocytoma ; pathology

Antigens, Nuclear ; metabolism ; Cordotomy ; methods ; Diagnosis, Differential ; Ependymoma ; metabolism ; pathology ; Follow-Up Studies ; Humans ; Male ; Middle Aged ; Nerve Tissue Proteins ; metabolism ; Neurocytoma ; metabolism ; pathology ; surgery ; Oligodendroglioma ; S100 Proteins ; metabolism ; Spinal Cord Neoplasms ; metabolism ; pathology ; surgery ; Synaptophysin ; metabolism

Neurocytoma, a rare brain tumor, is characterized by a mass located mainly in cerebral ventricles. It is prone to be misdiagnosed as oligodendroglioma or ependymoma due to their similar histopathological features in clinical practice. This study aimed to examine the clinicopathological features and differential diagnosis of central and extraventricular neurocytoma. The clinical and histopathological data of 17 patients (male: female=7:10; age: 4-41 years; mean age: 27.4 years) with central or extraventricular neurocytoma were retrospectively analyzed. These patients showed typical radiological, histopathological and immunohistochemical features of neurocytoma. The tumor tissue was found to be composed of small uniform cells with round nuclei and clear cytoplasm resembling that of oligodendroglioma and ependymoma. Immunohistochemistry revealed the tumor tissues were positive for neuronal markers such as synaptophysin (SYN) and neuronal nuclear antigen (NeuN). It was concluded histopathological features of neurocytoma overlaps with some tumors in the central neural system. Immunopositivity for SYN and NeuN can help differentially diagnose neurocytoma.
Adolescent ; Adult ; Antigens, Nuclear ; metabolism ; Biomarkers, Tumor ; metabolism ; Brain Neoplasms ; pathology ; Brain Stem ; pathology ; Cerebral Ventricle Neoplasms ; pathology ; Child ; Child, Preschool ; Female ; Humans ; Male ; Nerve Tissue Proteins ; metabolism ; Neurocytoma ; pathology ; Retrospective Studies ; Synaptophysin ; metabolism ; Young Adult

A seventeen-year-old female patient was admitted with sudden-onset of headache and vomiting. Brain magnetic resonance imaging demonstrated a heterogeneously enhancing tumour in the left lateral ventricle. The tumour was removed and confirmed as a central neurocytoma (CN). For the residual tumour in the left lateral ventricle, gamma knife stereotactic radiosurgery was done at fifteen months after the initial surgery. Tumour recurred in the 4th ventricle at 5 yr after initial surgery. The tumour was removed and proved as a CN. In vitro primary culture was done with both tumours obtained from the left lateral ventricle and the 4th ventricle, respectively. Nestin, a neuronal stem cell marker was expressed in reverse Transcriptase-Polymerase Chain Reaction of both tumors. Both tumours showed different morphology and phenotypes of neuron and glia depending on the culture condition. When cultured in insulin, transferrin selenium and fibronectin media with basic fibroblast growth factors, tumour cells showed neuronal morphology and phenotypes. When cultured in the Dulbeco's Modified Essential Media with 20% fetal bovine serum, tumors cells showed glial morphology and phenotypes. It is suggested that CN has the characteristics of neuronal stem cells and potential to differentiate into mature neuron and glial cells depending on the environmental cue.
Brain Neoplasms/*pathology ; Cell Culture Techniques/methods ; Cell Differentiation ; Female ; Humans ; Neurocytoma/*pathology ; Stem Cells/*pathology ; Young Adult

Animals ; Antigens, Nuclear ; metabolism ; Basic Helix-Loop-Helix Transcription Factors ; metabolism ; Biomarkers, Tumor ; metabolism ; Central Nervous System Neoplasms ; metabolism ; pathology ; Diagnosis, Differential ; Ependymoma ; metabolism ; pathology ; Humans ; Immunohistochemistry ; methods ; Intermediate Filament Proteins ; metabolism ; Medulloblastoma ; metabolism ; pathology ; Mucin-1 ; metabolism ; Nerve Tissue Proteins ; metabolism ; Nestin ; Neurocytoma ; metabolism ; pathology ; Oligodendrocyte Transcription Factor 2 ; Oligodendroglioma ; metabolism ; pathology

Adult ; Humans ; Lateral Ventricles ; pathology ; Male ; Neurocytoma ; pathology

OBJECTIVES: To determine the presentation, incidence, and risk factors of seizures in patients treated for brain tumors. METHODS: One hundred patients who consecutively underwent a craniotomy for the treatment of supratentorial brain tumors were assessed. The pathologies of the patients enrolled in the study included glioma (n=56), meningioma (n=31), metastatic brain tumor (n=7), primary central nervous system lymphoma (n=4), and central neurocytoma (n=2). Anti-epileptic drugs (AEDs) were administered to all patients for up to six months after the surgery. Pre-defined variables for outcome analysis included tumor grade and location, extent of tumor resection, number of seizures, age at tumor diagnosis, adjuvant therapy, medication and radiological abnormalities. RESULTS: Thirty patients (30%) presented at least a single episode of seizure at the time of admission. Five of these patients (16.7%) developed the seizure during the follow-up period. Newly developed seizure was noticed in six out of seventy patients (8.6%) without prior seizure. Histopathology was malignant gliomas in 10 and supratentorial meningioma in one. Early seizure developed only in two patients. CONCLUSION: Compared with patients without seizure, patients with seizure at the time of admission showed younger age (p=0.003), a higher portion of low-grade glioma (p=0.001), tumor location in the frontal and temporal lobes (p=0.003) and cortical involvement (p=0.017). Our study suggestes that tumor progression is considered a significant risk factor for seizure development in glioma patients.
Brain Neoplasms* ; Brain* ; Central Nervous System ; Craniotomy ; Diagnosis ; Follow-Up Studies ; Glioma ; Humans ; Incidence ; Lymphoma ; Meningioma ; Neurocytoma ; Pathology ; Risk Factors ; Seizures* ; Temporal Lobe

We report a case of extraventricular neurocytoma(left parietal lobe) in a young man presented with hemiparesis. The tumor, a radiologically well-circumscribed, cystic and enhancing mass, was partially removed. The patient, who received postoperative radiotherapy, is living well after 15 months of follow-up. Pathology showed a well-differentiated lesion composed of uniform, round cells with perinuclear halos in a neuropil background, immunohistochemically positive for neuronal markers. This was a cystic extraventricular neurocytoma(glio-neuronal tumor) arising from the left parietal lobe. Its features were consistent with neurocytoma pathologically and were different from those of intraventricular neurocytoma pathophysiologically. We outline the morphological and immunohistochemical evaluations necessary to recognize this rare tumor.
Follow-Up Studies ; Humans ; Neurocytoma* ; Neurons ; Neuropil ; Paresis ; Parietal Lobe ; Pathology ; Rabeprazole ; Radiotherapy ; Synaptophysin

Human central neurocytoma is a kind of the brain tumors that are usually found in anterior part of the lateral ventricles. In this study, we established conditions that allowed proliferation of neurocytoma cells culture and analyzed characteristics of neurocytoma cells in vitro. For in vitro, a condition that used for culturing neural stem cells and contained basic fibroblast growth factor (bFGF) provided high proliferation. RT-PCR analaysis showed that nestin was found in neurocytoma cells, indicating that the neurocytomas possess neural stem cell properties. Interestingly, treatment of neurocytoma cells with forskolin increased expression of glial fibrillary acidic protein with a concomitant decrease in the nestin expression. Forskolin also induced morphological changes of neurocytoma cells to adopt an astrocyte-like phenotype. The results suggest that neurocyotma cells may have properties of multipotent neural stem cells.
Animals ; Astrocytes/cytology/*physiology ; Cell Differentiation/*drug effects ; Cell Proliferation ; Cell Shape ; Fibroblast Growth Factor 2/pharmacology ; Forskolin/*pharmacology/*therapeutic use ; Humans ; Intermediate Filament Proteins/metabolism ; Nerve Tissue Proteins/metabolism ; Neurocytoma/*drug therapy/pathology ; Research Support, Non-U.S. Gov't ; Tumor Cells, Cultured