hemangioendothelioma

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hemangioendothelioma

 [he-man″je-o-en″do-the″le-o´mah]
a rare, well-differentiated endothelial tumor with an appearance between that of a hemangioma and a sarcoma; sometimes considered to be identical to a hemangiosarcoma.

he·man·gi·o·en·do·the·li·o·ma

(hē-man'jē-ō-en'dō-thē'lē-ō'mă),
A neoplasm derived from blood vessels, characterized by numerous prominent endothelial cells that occur singly, in aggregates, and as the lining of congeries of vascular tubes or channels; in the elderly, may be malignant (angiosarcoma or hemangiosarcoma), but in children are benign and probably represent a growing stage of capillary hemangioma. Locally invasive but only rarely metastasize.
[hemangio- + endothelium + G. -oma, tumor]

he·man·gi·o·en·do·the·li·o·ma

(hē-man'jē-ō-en'dō-thē'lē-ō'mă)
A neoplasm derived from blood vessels, characterized by numerous prominent endothelial cells that occur singly, in aggregates, and as the lining of congeries of vascular tubes or channels; in the elderly, may be malignant (angiosarcoma or hemangiosarcoma), but in children are benign and probably represent a growing stage of capillary hemangioma.
Synonym(s): haemangioendothelioma.

he·man·gi·o·en·do·the·li·o·ma

(hē-man'jē-ō-en'dō-thē'lē-ō'mă)
A neoplasm derived from blood vessels, characterized by numerous prominent endothelial cells that occur singly, in aggregates, and as the lining of congeries of vascular tubes or channels; in the elderly, may be malignant (angiosarcoma or hemangiosarcoma), but in children are benign.
Synonym(s): haemangioendothelioma.
References in periodicals archive ?
Epithelioid hemangioendothelioma (EHE) is a rare endothelial neoplasm first described by Weiss and Enzinger (1) in 1982.
The primary pleural mesenchymal tumors can be distilled into 3 groups: fibroblastic tumors (solitary fibrous tumor [SFT] and its malignant counterpart, malignant SFT; calcifying fibrous tumor [CFT]; and desmoid-type fibromatosis [DTF]), vascular tumors (epithelioid hemangioendothelioma [EHE] and angiosarcoma [AS]), and tumors of uncertain differentiation (synovial sarcoma [SS] and desmoplastic small round cell tumor).
Successful treatment of Kasabach-Merritt phenomenon arising from kaposiform hemangioendotheliomas by sirolimus.
Examples of primary neoplasms include hemangioma, hamartoma, lymphangioma, littoral cell angioma, hemangioendothelioma, and angiosarcoma.
While the infant's coagulopathy and borderline thrombocytopenia initially raised concern for Kasabach-Merritt phenomenon (KMP), no significant vascularity was demonstrated on the CT imaging, making the diagnosis of kaposiform hemangioendothelioma with associated KMP less likely.
CT scan with IV contrast could diagnose 3 out of the 6 benign tumours as hemangioendotheliomas and the other 3 as mesenchymal hamartomas.
Epithelioid hemangioendothelioma (EHE) is a rare low-grade malignant vascular tumor, which occur in skin, soft tissue, and visceral organs such as the lung and liver.
Many of these children may be asymptomatic initially and their HHE might be diagnosed only if an ultrasound is performed for unrelated reasons or if they also have cutaneous hemangioendotheliomas, which are common skin tumors not infrequently associated with IHH.
Epithelioid hemangioendotheliomas represent another group of vascular sarcomas derived from endothelial cells.
Nearly 90% of infantile hemangioendotheliomas are diagnosed in the first 6 months of life, and one-third are diagnosed within the first month.
The initial pathologic specimens were reviewed and considered to be epithelioid hemangioendotheliomas. The patient was referred to our clinic for evaluation and management.
(13) In addition, virtually all subtypes of hemangioendotheliomas were positive for ERG, including kaposiform hemangioendotheliomas, retiform hemangioendotheliomas, and epithelioid hemangioendotheliomas.