pinealoma/phosphatase

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Placental alkaline phosphatase in the cerebrospinal fluid of patients affected by pineal region neoplasms.

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PTEN mutations and activation of the PI3K/Akt/mTOR signaling pathway in papillary tumors of the pineal region.

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Papillary tumors of the pineal region (PTPR) are recognized as a distinct entity in the World Health Organization classification of CNS tumors. Papillary tumors of the pineal region frequently show loss of chromosome 10, but no studies have investigated possible target genes on this chromosome.

OCT4 immunohistochemistry is superior to placental alkaline phosphatase (PLAP) in the diagnosis of central nervous system germinoma.

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OCT4 is an 18-kDa POU-domain transcription factor encoded by the POU5F1 gene. Also known as OCT3, OTF3, and POU5F1, OCT4 is involved in the initiation, maintenance, and differentiation of pluripotent and germline cells during normal development. It is expressed in mouse and human embryonic stem and

Case report: pineocytoma in a male Fischer 344 rat.

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An enlarged pineal gland was observed in a 112-wk-old male Fischer 344 rat from the low-dose treatment group in a 2-yr bioassay. Formalin-fixed, paraffin-embedded sections of the gland were stained with hematoxylin and eosin along with the immunohistochemical biomarkers synaptophysin, placental

Pineocytoma with intratumoral hemorrhage following ventriculoperitoneal shunt--case report.

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A 58-year-old female with pineocytoma developed intratumoral hemorrhage after ventriculoperitoneal shunting for hydrocephalus. Neurological examination revealed Parinaud's sign and papilledema. Computed tomography and magnetic resonance (MR) imaging revealed a pineal neoplasm and obstructive

Immunohistochemical study of placental alkaline phosphatase in primary intracranial germ-cell tumors.

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Indirect immunoperoxidase staining by the peroxidase-antiperoxidase (PAP) technique was carried out on 23 human primary intracranial germ-cell tumors (17 germinomas, one embryonal carcinoma, one yolk-sac tumor, three teratomas, and one teratoma with embryonal carcinoma) and on six human primary

Calcineurin, a calcium/calmodulin-regulated protein phosphatase, in mammalian neuroendocrine cells and neoplasms.

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Calcineurin is a calcium/calmodulin-regulated protein phosphatase. By using enzyme-immunoassay and immunocytochemistry with an affinity-purified specific antibody to this protein, we have found that calcineurin is expressed in the central and peripheral neuroendocrine cells, also termed amine

Immunostaining for calcineurin, a Ca2+/calmodulin-regulated protein phosphatase, in the diagnostic tumor pathology.

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The present immunochemical study concerns the distribution of calcineurin (CaN), a Ca2+/calmodulin-regulated protein phosphatase, in the nervous and neuroendocrine systems of mammals, and discloses the CaN-immunostaining results of human neoplasms. CaN immunoreactivity (ir) was present throughout

Biomarkers of Pineal Region Tumors: A Review.

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Background: The pineal gland, a small, pinecone-shaped organ deep within the brain, is responsible for producing melatonin. The gland consists of pineal parenchymal cells and glial cells that can form neoplasms. Pineal region neoplasms can also arise from germ cells and adjacent structures.

[A case of pineal region germinoma treated by interstitial brachytherapy].

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Although radiation therapy has been universally accepted as treatment for primary intracranial germinomas, the optimal technique for both diagnosis and treatment continues to be a matter of controversy. We report a case of germinoma in the pineal region treated by interstitial brachytherapy. A

So-called intracranial germ cell tumours: personal experiences and a theory of their pathogenesis.

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We investigated 110 cases of intracranial germ cell tumours (up to the end of 1986), 56% of which showed monotypic histological patterns and 44% were shown to be mixed tumours. All these cases underwent surgery followed by radiation and/or chemotherapy. All cases of choriocarcinoma and embryonal

Immature teratoma producing alpha-fetoprotein without components of yolk sac tumor in the pineal region.

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A case of pineal region tumor in a 9-year-old boy with a high serum alpha fetoprotein (AFP) level is reported. The serum levels of beta-human chorionic gonadotropin (HCG) and placental alkaline phosphatase (PLAP) were not elevated. The tumor was composed of radiologically different components and

Comparative analysis of germ cell transcription factors in CNS germinoma reveals diagnostic utility of NANOG.

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The homeodomain transcription factor, NANOG, along with OCT3/4 (POU5F1) and SOX2, is part of the core set of transcription factors that maintain embryonic stem cell self-renewal and pluripotency. Expression of NANOG has been detected in fetal germ cells and in gonadal germ cell tumors. To assess the

Pineal gland lesions: a cytopathologic study of 20 specimens.

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BACKGROUND Pineal gland lesions are rare, with only a few cytologic descriptions occurring in the literature, according to the authors' knowledge. The current article describes the cytopathologic characteristics of 20 such lesions with discussion of differential diagnoses. METHODS Cytologic material

Phase I clinical evaluation of diaziquone in childhood cancer.

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Diaziquone (AZQ), a new lipid-soluble antitumor agent, was given by 15-30-minute infusion on a daily X 5 schedule to 47 children with refractory solid tumors and leukemia. The starting daily dose of 6 mg/m2 was escalated to 10 and 35 mg/m2 in patients with solid tumors and leukemia, respectively. In

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