neurofibromatosis 2/progesterone

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Neurofibromatosis type 2 gene mutation and progesterone receptor messenger RNA expression in the pathogenesis of sporadic orbitocranial meningioma.

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To investigate neurofibromatosis type 2 (NF2) gene mutation at mRNA levels in sporadic orbitocranial meningioma and its association with progesterone receptor (PR) mRNA expression.This was a case-control study. Thirty-four sporadic meningioma patients with

Relationships Between Neurofibromatosis-2, Progesterone Receptor Expression, the Use of Exogenous Progesterone, and Risk of Orbitocranial Meningioma in Females.

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Background: The pathogenesis of meningioma in females and its association with exogenous progesterone is remained unclear. This study was aimed to examine expression of Progesterone receptor (PR) and Neurofibromatosis-2 (NF2) and assess their relationships to history of exogenous

Vestibular schwannoma quantitative polymerase chain reaction expression of estrogen and progesterone receptors.

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OBJECTIVE Determine the role of estrogen receptor (ER) and progesterone receptor (PR) expression in sporadic and neurofibromatosis 2 (NF2)-related vestibular schwannomas (VS). Growth and proliferation signaling in human VS tumorigenesis may play a key role in molecular therapeutic targeting. VS

Specific genes expressed in association with progesterone receptors in meningioma.

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An association between hormones and meningioma has been postulated. No data exist that examine gene expression in meningioma by hormone receptor status. The data are surgical specimens from 31 meningioma patients undergoing neurosurgical resection at Brigham and Women's Hospital from March 15, 2004

Brief report on similar mutational changes in neurofibromatosis type 2 gene in minute pulmonary meningothelial-like nodule and meningioma of the central nervous system.

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Minute Pulmonary Meningothelial-like Nodules (MPMNs) are usually detected incidentally adjacent to lung cancer tissue. The pathogenesis is unknown. MPMNs reportedly share the status of neurofibromatosis (NF)-2 gene with meningiomas of the central nervous

[Report of seven cases of clear-cell meningioma and a literature review].

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OBJECTIVE Clear cell meningioma (CCM) is a rare variant of meningioma, which is important to distinguish because of its aggressive behaviour. Sixty-eight cases have been previously described in the literature. In this retrospective study, we report seven cases of CCM operated in our institution

The Ki-67 proliferation antigen in meningiomas. Experience in 600 cases.

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BACKGROUND Meningiomas are mostly benign tumours that can be cured by surgical resection. Because meningiomas tend to recur, long term management in patients with subtotal tumour resection remains controversial. Previous studies have shown that the proliferation potential of meningiomas by Ki-67

Meningiomas.

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This article reviews the recent literature on the pathogenesis and pathology of meningiomas, contemporary techniques of surgical resection, and new nonsurgical treatments, including radiation and hormone therapy. Factors predisposing to meningioma formation include female sex, previous ionizing

Meningioma: an update.

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OBJECTIVE Recent clinical and molecular research has shed new light on the biology of meningiomas--a common but understudied CNS neoplasm. This review will focus on recent advances and their significance for future research and treatment. RESULTS Meningiomas represent the second most common brain

Guidelines to the treatment of meningioma.

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BACKGROUND Meningiomas constitute the largest subgroup of all intracranial tumours. Their incidence is about 2-3/100,000/yr, with a 3:2 to 2:1 female:male ratio, with a peak incidence in the sixth and the seventh decade of life. Meningiomas are usually slow growing, benign neoplasms, causing

Clinical features and treatment of World Health Organization grade II and III meningiomas in childhood: report of 23 cases.

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OBJECTIVE High-grade meningiomas in childhood are rare, and their clinical features are unknown. The objective of this study was to determine the clinical characteristics and prognosis of childhood high-grade meningiomas. METHODS Twenty-three patients with childhood high-grade meningiomas were

Proliferation potential of spinal meningiomas.

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OBJECTIVE The goal of the present study was to quantitatively assess the proliferation index and progesterone receptor status of spinal versus intracranial meningiomas and to determine if these biological indicators can describe the clinical behavior of these tumors. This information could provide

Clear cell meningioma. A clinicopathologic study of a potentially aggressive variant of meningioma.

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Since clear cell meningioma has only recently been recognized as a morphologic entity, its pathobiology has not been studied. Fourteen examples occurring in seven females and six males, ages 9 to 82 years (mean 29 years), were examined; one was associated with type 2 neurofibromatosis. Of these

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