No abstract available.
Astrocytoma* ; Tuberous Sclerosis*

No abstract available.
Astrocytoma* ; Paralysis* ; Pineal Gland*

Of the case of malignant astrocytoma, spontaneous transdural extension is very rare. Only several cases of transdural extension of primary intracranial tumor are reported. However, these cases are through the foramina of the skull base. We have experienced a case of malignant astrocytoma which directly extended out through the dura and calvarium near the pterion of the left side.
Astrocytoma* ; Skull ; Skull Base

Cerebellar astrocytomas have some characteristics such as benign histologic features, frequent cyst formation, tumors of early life and good postoperative prognosis. Cerebellar astrocytomas may arise from any part of cerebellum and tumors originated from vermis usually grew symmetrically in the vermis or invade the hemisphere. We recently experienced a case of cerebellar astrocytoma which entirely filled the 4th ventricle without evidence of tumor growth in the vermis or hemisphere. We report this case with its autopsy findings.
Astrocytoma* ; Autopsy ; Cerebellum ; Prognosis

No abstract available.
Astrocytoma* ; Tuberous Sclerosis*

We report a case of solitary primary leptomeningeal glioma. The mass was totally removed under awake surgery. Intraoperatively, no parenchymal involvement was noted. Histopathological study revealed a predominant anaplastic oligodendroglioma component and a focal anaplastic astrocytoma component, which was consistent with an anaplastic oligoastrocytoma. Adjuvant tomotherapy was followed and the tumor has not recurred until 12 months after surgery. A focal type of primary leptomeningeal glioma is extremely rare. We report a rare case of solitary primary leptomeningeal anaplastic oligoastrocytoma.
Astrocytoma ; Glioma* ; Oligodendroglioma

This retrospective study was carried out on 57 children (34 boys and 23 girls, aged from 1 to 14 years old) with brain tumors (cerebral astrocytomas) treated by surgery and radiotherapy and chemotherapy at HCM city Cancer Hospital from Jan 1st 1997 to Dec 31st 2001. Results: common symptoms at the onset were intra-cranial hypertension and focal neurological dysfunction. All had only single tumor. The most common location was in the cerebellum, and then was in the hemispheres. The indication of adjuvant therapies depended on histological grades, child’s age extension of excision, performance status... 65% patients completed the treatment course, and the rest neither completed nor treated because of rapid progression of disease. The median survival of all patients depended on histological grades
Astrocytoma ; child ; Hypertension

Multiple primary brain tumors of different cell types are rare, accounting for 0.4% of all the primary brain tumors. Phakomatosis, irradiation, trauma and other factors have been associated with multiplicity of brain tumors. When these tumors are close or intermixed, the term "collision" has been used, and in these cases an explanation might be that one tumor stimulating the other. We report a patient with collision tumor of meningioma and anaplastic astrocytoma, who did not have a history of trauma, irradiation, or phakomatosis.
Astrocytoma* ; Brain Neoplasms ; Humans ; Meningioma* ; Neurocutaneous Syndromes

Astrocytoma in the thalamus in not so frequent in incidence (1%). Moreover, bilateral thalamic tumor is rare. Certain tumors of the thalamus are considered resectable but most of thalamic tumors are thought to be untouchable. Bilateral thalamic astrocytoma with hydrocephalus was diagnosed by stereotactic biopsy and ventriculoperitoneal shunt operation was done with result of improvement. We report a case of astrocytoma in the bilateral thalamus with literature review.
Astrocytoma* ; Biopsy ; Hydrocephalus ; Incidence ; Thalamus* ; Ventriculoperitoneal Shunt

OBJECTIVE: PTEN is a novel tumor-suppressor gene located on chromosomal band 10q23. Loss of PTEN function has been implicated in the progression of several types of cancer, including glial tumors. This study is performed to evaluate the difference of PTEN expression between the low grade glial tumors and the high grade one. METHODS: Formalin fixed and paraffin embedded tissues from 15 patients with low grade astrocytoma and oligodendroglioma, and 26 patients with glioblastoma, anaplastic astrocytoma, anaplastic oligodendroglioma and malignant mixed glial tumor were evaluated for PTEN expression by immunohistochemical method. RESULTS: Eleven(73%) of 15 cases of low grade glial tumors revealed PTEN expression and eight(31%) of 26 cases of high grade glial tumors, including glioblastoma, revealed PTEN expression. CONCLUSION: The present study suggests that loss of PTEN expression is related with tumor progression from the low grade glial tumor to glioblastoma.
Astrocytoma ; Brain* ; Formaldehyde ; Glioblastoma ; Humans* ; Oligodendroglioma ; Paraffin