نتایج جستجو برای: cerebral astrocytoma
تعداد نتایج: 187104 فیلتر نتایج به سال:
Rosette-forming glioneuronal tumor (WHO grade I) is a rare neoplasm primarily arising in young adults that is characterized by distinctive neurocytic rosette formation, a spindled glial component resembling pilocytic astrocytoma, and a high incidence of PIK3CA mutation. Low-grade diffuse astrocytoma (WHO grade II), on the other hand, is far more common and is characterized by a high incidence o...
PURPOSE To determine the relationship between the subventricular zone (SVZ) and astrocytoma based on magnetic resonance imaging (MRI) and whether SVZ involvement can be used to distinguish solitary cerebral metastases (SCMs) from astrocytomas. METHODS This retrospective study involved 154 patients with solitary low-grade astrocytoma (LGA), high-grade astrocytoma (HGA), and SCM, who underwent ...
A 32-year-old male presented with progressive pure amnesia caused by astrocytoma invading the bilateral medial temporal lobes. Methionine positron emission tomography demonstrated the extent of tumor invasion well. His memory impairment was partially improved by treatment for the astrocytoma. Lesion of the bilateral hippocampus causes memory impairment, but pure memory loss without other associ...
Pilocytic astrocytoma is a slowly growing neoplasia that represents the most frequent cerebral tumor in pediatric age. Malignant transformation is rare and it is usually related to previous radiotherapy. The authors describe a case of a spontaneous malignant transformation of a pilocytic astrocytoma. A 3-year-old boy was diagnosed with a cerebellar hemisphere tumor. He was submitted to a comple...
Cerebral astrocytoma has been found in two patients with AIDS related conditions. The fortuity of this unusual association is discussed, insofar as immunosuppression could favour the growth of certain neoplasms.
Fahr's disease is a rare entity characterized by abnormal calcification in the bilateral basal ganglion regions and cerebellum. Concurrence of Fahr's disease with brain tumor is associated with an even lower incidence; the present study describes the fifth such case, in which a 32-year-old female presented with a 1-month history of headache and unsteady walking. Pathology and imaging studies re...
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