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paraganglioma/tyrosine
Ο σύνδεσμος αποθηκεύεται στο πρόχειρο
Σελίδα 1 από 74 Αποτελέσματα
Tyrosine kinase receptors as molecular targets in pheochromocytomas and paragangliomas.
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Σύνδεση εγγραφή
Pheochromocytomas and paragangliomas are neuroendocrine tumors shown to be responsive to multitargeted tyrosine kinase inhibitor (TKI) treatment. Despite growing knowledge regarding their genetic basis, the ability to predict behavior in these tumors remains challenging. There is also limited
Paragangliomas of the craniocervical region. An immunohistochemical study on tyrosine hydroxylase.
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Σύνδεση εγγραφή
An immunohistochemical study on tyrosine hydroxylase (TH), a rate-limiting enzyme in the catecholamine synthesizing pathway, was made on three craniocervical region paragangliomas, two of which showed metastases to the cervical lymph nodes. In all of the original tumors, the majority of tumor cells
Recent advances in the management of malignant pheochromocytoma and paraganglioma: focus on tyrosine kinase and hypoxia-inducible factor inhibitors.
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Σύνδεση εγγραφή
Inactivating mutations of the succinate dehydrogenase subunit B ( SDHB) gene and the subsequent stabilization and activation of the hypoxia-inducible factor 2-alpha (HIF2α) unit are recognized hallmarks associated with the development of metastatic pheochromocytomas and paragangliomas (MPPG).
Catecholamine-secreting infratemporal fossa paraganglioma.
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Extraadrenal paragangliomas are tumors of the paraganglion system, usually arising from the carotid bodies, the glomus jugulare, or the glomus tympanicum. These tumors are capable of secreting catecholamines which can cause severe hypertensive crises. This paper reports a case of a patient who
A systematic review on the genetic analysis of paragangliomas: primarily focused on head and neck paragangliomas.
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Head and neck paragangliomas Paragangliomas and pheochromocytomas are rare, mostly benign neuroendocrine tumors, which are embryologically derived from neural crest cells of the autonomic nervous system. Paragangliomas are essentially the extra-adrenal counterparts of pheochromocytomas. As such this
Biochemically silent abdominal paragangliomas in patients with mutations in the succinate dehydrogenase subunit B gene.
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BACKGROUND
Patients with adrenal and extra-adrenal abdominal paraganglioma (PGL) almost invariably have increased plasma and urine concentrations of metanephrines, the O-methylated metabolites of catecholamines. We report four cases of biochemically silent abdominal PGL, in which metanephrines were
Metastatic paraganglioma and treatment with sunitinib: a case report.
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Sunitinib malate is a small kinase inhibitor with activity against a number of tyrosine kinase receptors. We treated a young man suffering from a metastatic paraganglioma with sunitinib. In this report we discuss a number of related questions including the correct dosage, schedules and timing of
Targeting VEGF-VEGFR Pathway by Sunitinib in Peripheral Primitive Neuroectodermal Tumor, Paraganglioma and Epithelioid Hemangioendothelioma: Three Case Reports.
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Sunitinib malate (Sutent(TM); Pfizer Inc., New York, N.Y., USA) is a small molecule kinase inhibitor with activity against a number of tyrosine kinase receptors, including vascular endothelial growth factor receptors, stem-cell factor receptor, and platelet-derived growth factor receptors alpha and
Sunitinib for the treatment of metastatic paraganglioma and vasoactive intestinal polypeptide-producing tumor (VIPoma).
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OBJECTIVE
Gastroenteropancreatic neuroendocrine tumors (NETs) are rare tumors of the endocrine and nervous systems. Whereas early surgical resection can significantly reduce tumor mass, there are few data available concerning the control of hormonal secretion and associated symptoms. Studies have
Catecholamine metabolism in paraganglioma and pheochromocytoma: similar tumors in different sites?
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Σύνδεση εγγραφή
Pheochromocytoma (PHEO) and paraganglioma (PGL) are catecholamine-producing neuroendocrine tumors that arise respectively inside or outside the adrenal medulla. Several reports have shown that adrenal glucocorticoids (GC) play an important regulatory role on the genes encoding the main enzymes
Catecholamine-Synthesizing Enzymes in Pheochromocytoma and Extraadrenal Paraganglioma.
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In chromaffin cells, tyrosine hydroxylase (TH), aromatic L-amino acid decarboxylase (AADC), dopamine β-hydroxylase (DBH), and phenylethanolamine N-methyltransferase (PNMT) are mainly involved in catecholamine synthesis. In this study, we evaluated the association between the status of
A report of succinate dehydrogenase B deficiency associated with metastatic papillary renal cell carcinoma: successful treatment with the multi-targeted tyrosine kinase inhibitor sunitinib.
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We report a patient who initially presented with an abdominal paraganglioma and subsequently metastatic papillary cell renal cancer. Genetic analysis revealed a 141 G>A (exon 2) Trp47X mutation within the succinate dehydrogenase B gene. Treatment with the novel multi-targeted tyrosine kinase
Malignant pheochromocytomas and paragangliomas: molecular signaling pathways and emerging therapies.
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Patients having malignant pheochromocytomas and paragangliomas traditionally have been treated with systemic chemotherapy and (131)I-meta-iodobenzylguanidine. However, these therapies have limited efficacy and the potential for significant toxicity. Over the last decade, researchers have discovered
Successful treatment of paraganglioma with sorafenib: a case report and brief review of the literature.
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BACKGROUND
To date, no effective systemic therapies have been made available for paraganglioma. However, multiple mutations in susceptibility genes have been identified that are potential targets for sorafenib, an oral multitargeted tyrosine-kinase inhibitor.
METHODS
We report the case of a
The evolving field of tyrosine kinase inhibitors in the treatment of endocrine tumors.
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Activation of tyrosine kinase receptors (TKRs) and their related pathways has been associated with development of endocrine tumors. Compounds that target and inactivate the kinase function of these receptors, tyrosine kinase inhibitors (TKIs), are now being applied to the treatment of endocrine
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