hemangioma/نقص الأكسجة

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High-Output Heart Failure from a Hepatic Hemangioma With Exertion-Induced Hypoxia.

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Patients with hepatic hemangiomas have been known to have high-output heart failure as a result of left-to-right arteriovenous shunting. We report a patient with a hepatic hemangioma that presented with high-output heart failure with hypoxia on exertion. After embolization of the hemangioma, the

Increased incidence of placental chorioangioma in high-altitude pregnancies: hypobaric hypoxia as a possible etiologic factor.

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OBJECTIVE Our purpose was to determine the effects of pregnancy at high altitude on the human placental structure. METHODS Histologic material from 22 term placentas delivered at altitudes above 3600 m was examined and compared with control material from 760 m. RESULTS Intraplacental chorioangiomas

A possible hypoxia-induced endothelial proliferation in the pathogenesis of epithelioid hemangioma.

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Epithelioid hemangioma is an uncommon benign vascular lesion with distinct clinicopathological characteristics. Histologically, this entity mainly composed of well-formed but often immature vessels lined by epithelioid endothelial cells with prominent chronic inflammatory component. There is

Overexpression of gankyrin in mouse hepatocytes induces hemangioma by suppressing factor inhibiting hypoxia-inducible factor-1 (FIH-1) and activating hypoxia-inducible factor-1.

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Gankyrin (also called p28 or PSMD10) is an oncoprotein commonly overexpressed in hepatocellular carcinomas. It consists of 7 ankyrin repeats and interacts with multiple proteins including Rb, Cdk4, MDM2 and NF-κB. To assess the oncogenic activity in vivo, we produced transgenic mice that overexpress

Hypoxia, hormones, and endothelial progenitor cells in hemangioma.

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Hemangiomas are the most common tumor of infancy, and although the natural history of these lesions is well described, their etiology remains unknown. One current theory attributes the development of hemangiomas to placentally-derived cells; however, conclusive evidence to support a placental origin

Von Hippel-Lindau gene deletion and expression of hypoxia-inducible factor and ubiquitin in optic nerve hemangioma.

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OBJECTIVE Von Hippel-Lindau (VHL) disease is a hereditary cancer syndrome expressed in multiple organs caused by germline alterations of the VHL gene. We have shown VHL deletion in the "stromal" cells of retinal angiomas. The VHL protein-associated complex is a primary ubiquitin ligase for the

Silencing microRNA-210 in Hypoxia-Induced HUVEC-Derived Extracellular Vesicles Inhibits Hemangioma

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Background: Hemangioma (Hem) is a benign tumor commonly seen in infancy with a relative high morbidity. Human umbilical vein endothelial cell (HUVEC)-derived extracellular vesicles (EVs) are actively participated in Hem. Therefore, this

Association of chorangiomas to hypoxia-related placental changes in singleton and multiple pregnancy placentas.

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BACKGROUND Chorangiomas (CAs) are the most frequent non-trophoblastic tumor-like-lesions of the placenta, and since they occur with an unusual frequency in pregnancies at high altitude, they are considered as a part of a spectrum of hypoxia-related vascular lesions of the placenta. The aim of our

Association of ATF4 Expression With Tissue Hypoxia and M2 Macrophage Infiltration in Infantile Hemangioma.

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Accumulating studies have revealed the hypoxic condition and its crucial role in the distinctive progression of infantile hemangioma (IH), the most common benign tumor in infancy. Activating transcription factor 4 (ATF4), an important gene mediating cellular adaptation to various stress signals,

Does hypoxia play a role in infantile hemangioma?

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Infantile hemangioma (IH), the most common tumor of infancy, is characterized by rapid growth during infancy, followed by spontaneous involution over 5-10 years. Certain clinical observations have led to the suggestion that IH is triggered and maintained by hypoxia. We review the literature on the

Hypoxia-induced mediators of stem/progenitor cell trafficking are increased in children with hemangioma.

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OBJECTIVE The mechanism of neovascularization during the proliferative phase of infantile hemangioma is poorly understood. It is known that circulating bone marrow-derived endothelial progenitor cells (EPCs) form new blood vessels in ischemic tissues using mediators regulated by the transcription

Characteristics of infantile hemangiomas as clues to pathogenesis: does hypoxia connect the dots?

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Accelerated growth of hemangioblastoma in pregnancy: the role of proangiogenic factors and upregulation of hypoxia-inducible factor (HIF) in a non-oxygen-dependent pathway.

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Hemangioblastomas (HBs) are benign, highly vascular tumors, often characterized by loss of function of the von Hippel-Lindau (vHL) gene. They are the most common central nervous system tumor observed in vHL syndrome. Loss of function of the vHL gene creates a "pseudo-hypoxic" state, causing

Recent trends in chorangiomas, especially those of multiple and recurrent chorangiomas.

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The nomenclature and occurrence of chorangioma of the placenta are reviewed here. Recurrence of multiple chorangiomas has been described, but it is apparently an uncommon or underreported event. There is a strong relationship between placental chorangiomas and gestation at high altitude, suggesting

[Recurrence of multiple chorio-angiomas: a case-report].

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Diffuse chorioangiomatosis is a rare placental pathology characterized by multiple chorioangiomas, inducing a high risk of fetal complications, especially cardiovascular, with a risk of fetal death. The physiopathology is not clearly established but seems to be related with an over-expression of

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