hemangiopericytoma/progesterone

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[Solitary fibrous tumors and hemangiopericytomas of the meninges: Immunophenotype and histoprognosis in a series of 17 cases].

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BACKGROUND The 2007 World Health Organization (WHO) classification of tumors of the central nervous system distinguishes meningeal hemangiopericytomas (HPC) from solitary fibrous tumors (TFS). In the WHO classification of tumors of soft tissue and bone, those neoplasms are no longer separate

[A case of pulmonary parenchymal endometriosis].

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In 1982, a 45-year-old woman was hospitalized because of an abnormal lung shadow. The chest film provided evidence of pulmonary nodules. She was asymptomatic and had no labolatory abnormalities. Exploratory excision was performed to further assess the pulmonary nodules. The initial diagnosis was a

PAX8 expression in sporadic hemangioblastoma of the kidney supports a primary renal cell lineage: implications for differential diagnosis.

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Hemangioblastoma is a benign, morphologically distinctive neoplasm of disputed histogenesis that typically occurs in the central nervous system either in the setting of von Hippel-Lindau disease or more often sporadically. Extraneural hemangioblastoma is exceptional and raises a challenging

The effect of prolactin and bombesin on the growth of meningioma-derived cells in monolayer culture.

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Meningioma growth is thought to be stimulated by the sex hormones progesterone and possibly estrogen. We report here stimulation of growth of meningioma-derived cells in culture by prolactin. Fourteen human tumors taken from surgery were initially grown in Ham's medium F10 with 15% fetal calf serum.

Hormones and tumours in central nervous system (CNS): steroid receptors in primary spinal cord tumours.

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On the basis of the studies reported on steroid receptors in brain tumours, cytoplasmic and nuclear estrogen (ER) and progesterone (PR) receptors have been examined in forty primary spinal cord tumours: fifteen neurinomas, three neurofibromas, nine meningiomas, nine ependymomas, two astrocytomas,

High throughput screening of meningioma biomarkers using a tissue microarray.

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Meningiomas are histologically and clinically diverse CNS neoplasms with few available immunohistochemical markers of differentiation and progression. Therefore, we investigated a panel of potentially useful meningioma-associated biomarkers using high throughput tissue microarray

Adhesion cell molecules as potential markers of aggressiveness in meningiomas.

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Routine histopathological criteria are poor predictors of the outcome in meningiomas. The present study tried to determine if some adhesion cell molecules could be helpful in assessing the histological aggressiveness in meningiomas of all grades. Our series comprised 113 cases, WHO grade I (n=53),

Endometrial stromal sarcoma metastatic to the lung: a detailed analysis of 16 patients.

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Pulmonary metastases of endometrial stromal sarcoma (ESS) are uncommon and can pose diagnostic problems. We reviewed lung specimens from 16 patients with metastatic ESS. Patients were 31-77 years of age at the time of lung biopsy. Uterine ESSs were diagnosed an average of 9.8 years before lung

Immunohistochemical Approach to the Differential Diagnosis of Meningiomas and Their Mimics.

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The differential diagnosis between meningioma and others tumors can be challenging. This study aimed to evaluate different immunohistochemical markers for the differential diagnosis between meningioma and their morphological mimics. Immunohistochemistry was performed on tissue microarray with

Houdini Tumor: Case Report and Literature Review of Pregnancy-Associated Meningioma.

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BACKGROUND Meningiomas are common intracranial neoplasms of undetermined etiology. Accelerated growth during episodes of elevated serum estrogen and progesterone have been demonstrated in pregnant patients, as exhibited by an overexpression of estrogen or progesterone on immunohistochemical

Distinction of endometrial stromal sarcomas from 'hemangiopericytomatous' tumors using a panel of immunohistochemical stains.

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Endometrial stromal sarcomas are low-grade malignant tumors that may pose a diagnostic challenge, especially when they are present in an extrauterine site. Owing to the presence of an arborizing vasculature and cells with an undifferentiated appearance, endometrial stromal sarcomas can be confused

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