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ganglioglioma/l tyrosin
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15 Ergebnisse
[The occurrence of tyrosine hydroxylase-immunoreactive neurons in a parietal lobe ganglioglioma].
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A parietal lobe ganglioglioma in a 61-year-old male was investigated ultrastructurally and immunohistochemically, using antiserum against tyrosine hydroxylase (TH), a rate-limiting enzyme of the catecholamine (CA)-synthesizing pathway. On light microscopy, the tumor was composed mainly of neuronal
Immunohistochemical expression of tyrosine kinase (Trk) receptor proteins in mature neuronal cell tumors of the central nervous system.
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The interactions of neurotrophins with the Trk family of tyrosine kinase receptors result in growth and maturational changes in neuronal cells. Although the histogenesis of brain tumors composed of mature neuronal cells is still not completely understood, neurotrophins and Trk receptors may be
High amino acid uptake in a low-grade desmoplastic infantile ganglioglioma in a 14-year-old patient.
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Amino acid uptake is higher in high-grade than in low-grade gliomas; this is the rationale for using radioactively labelled amino acids for the non-invasive grading of brain neoplasms. We present a 14-year-old boy with a low-grade desmoplastic infantile ganglioglioma (DIG) that exhibited marked
Expression of brain-derived neurotrophic factor and tyrosine kinase B receptor proteins in glioneuronal tumors from patients with intractable epilepsy: colocalization with N-methyl-D-aspartic acid receptor.
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Recent evidence suggests that brain-derived neurotrophic factor (BDNF) and its tyrosine kinase B (TrkB) receptor, in addition to promoting neuronal survival and differentiation, modulates synaptic transmission by increasing N-methyl-D-aspartic acid receptor (NMDAR) activity. Overexpression of BDNF
Neuroendocrine markers in central nervous system neuronal tumors (gangliocytoma and ganglioglioma).
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We studied five cases of central nervous system neuronal tumor, one gangliocytoma and four gangliogliomas, both ultrastructurally and immunohistochemically, using antibodies to neuroendocrine markers including tyrosine hydroxylase (TH), serotonin (5HT), somatostatin (SOM), met-enkephalin (MEK),
The occurrence of catecholamine neurons in a parietal lobe ganglioglioma.
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A parietal lobe ganglioglioma in a 2-year-old girl was investigated ultrastructurally and immunohistochemically, using antiserum against tyrosine hydroxylase (TH), a rate-limiting enzyme of the catecholamine (CA)-synthesizing pathway. The tumor was composed essentially of neuronal and astrocytic
Tyrosine hydroxylase-immunoreactive neurons in the temporal lobe in complex partial seizures.
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The anterior mesial portion of the temporal lobe removed from 16 patients who underwent surgery for the treatment of complex partial seizures was found to contain tyrosine hydroxylase-immunoreactive neurons. The distribution of these neurons was correlated with the underlying neuropathological
A clinicopathologic and immunomorphologic study of 13 cases of ganglioglioma.
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The authors present the clinical, histopathologic, and immunomorphologic data of 13 intracranial gangliogliomas. Preoperative computed tomography scans showed a commonly cystic tumor of variable density. Six tumors were completely excised and seven were subtotally resected. After a mean follow-up of
Droplet digital PCR is a powerful technique to demonstrate frequent FGFR1 duplication in dysembryoplastic neuroepithelial tumors.
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Dysembryoplastic neuroepithelial tumors (DNT) share V600E mutation in the BRAF gene with other low grade neuroepithelial tumors (LGNTs). FGFR1 internal tandem duplication of the tyrosine-kinase domain (FGFR1-ITD), another genetic alteration that also leads to MAP kinase pathway alteration, has been
Expression and cellular distribution of high- and low-affinity neurotrophin receptors in malformations of cortical development.
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An increasing number of observations suggests an important and complex role for both high- (tyrosine kinase receptor, trk) and low- (p75) affinity neurotrophin receptors (NTRs) during development in human brain. In the present study, the cell-specific distribution of NTRs was studied in different
Steroid hormone receptors in meningiomas of Chinese patients.
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Meningioma is a hormone-related intracranial tumor. Brain tumor samples were collected from 32 Chinese patients, 20 of whom had meningiomas. Estrogen receptors were present in 6 of 17 meningiomas, 1 hemangioblastoma, 1 gemistocytic astrocytoma, and 1 neurilemoma. Of the 26 samples assayed for
BRAF alterations in brain tumours: molecular pathology and therapeutic opportunities.
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OBJECTIVE
To summarize the current knowledge on v-RAF murine sarcoma viral oncogene homologue B1 (BRAF) aberrations in tumours of the central nervous system.
RESULTS
BRAF alterations are found in variable frequencies across a wide spectrum of diverse central nervous system neoplasms. BRAF V600 point
Glioma biology and molecular markers.
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The tumors classified as gliomas include a wide variety of histologies including the more common (astrocytoma, glioblastoma), as well as the less common histologies (oligodendroglioma, mixed oligoastrocytoma, pilocytic astrocytoma). Recent efforts at comprehensive genetic characterization of various
Molecular and clinicopathologic features of gliomas harboring NTRK fusions
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Fusions involving neurotrophic tyrosine receptor kinase (NTRK) genes are detected in ≤2% of gliomas and can promote gliomagenesis. The remarkable therapeutic efficacy of TRK inhibitors, which are among the first Food and Drug Administration-approved targeted therapies for NTRK-fused gliomas, has
Neurochemical profile of glioneuronal lesions from patients with pharmacoresistant focal epilepsies.
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Gangliogliomas, dysembryoplastic neuroepithelial tumors (DNT) and glioneuronal malformations are frequently encountered in patients with pharmacoresistant focal epilepsies. In order to characterize the neurochemical profile of these neoplastic and malformative glioneuronal lesions, we have examined
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