hemangioendothelioma

hemangioendothelioma
A neoplasm derived from blood vessel s, 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. [hemangio- + endothelium + G. -oma, tumor]
- h. tuberosum multiplex an eruption of pinkish papules, caused by hyperplasia of the endothelium of the superficial blood vessel s.

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he·man·gio·en·do·the·li·o·ma or chiefly Brit hae·man·gio·en·do·the·li·o·ma -jē-ō-.en-dō-.thē-lē-'ō-mə n, pl -mas also -ma·ta -mət-ə an often malignant tumor originating by proliferation of capillary endothelium

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he·man·gio·en·do·the·lio·ma (he-man″je-o-en″do-the″le-oґmə) [hemangioma + endothelioma] a true neoplasm of vascular origin, characterized by proliferation of endothelial cells in and about the vascular lumen; it is usually considered to be intermediate in grade between hemangioma and hemangiosarcoma but sometimes is used to denote the latter.

Medical dictionary. 2011.

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  • Hemangioendothelioma — Classification and external resources ICD O: 9130 9133 MeSH D006390 Hemangioendothelioma is used to describe a group of vascular neoplasms that may be considered benign or …   Wikipedia

  • hemangioendothelioma — he·man·gi·o·endothelioma …   English syllables

  • hemangioendothelioma — hē|manjē(ˌ)ō+ noun Etymology: New Latin, from hemangio (from hemangioma) + endothelioma : an often malignant tumor originating by proliferation of capillary endothelium …   Useful english dictionary

  • Composite hemangioendothelioma — Classification and external resources ICD O: M9130/1 Composite hemangioendothelioma is a low grade angiosarcoma typically occurring in adults, although it has been described in infancy.[1] …   Wikipedia

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  • benign hemangioendothelioma — a benign neoplasm of blood vessel endothelium; the term is usually used to denote an infantile hemangioendothelioma …   Medical dictionary

  • retiform hemangioendothelioma — a rare type of hemangioendothelioma that forms blood vessels lined by endothelial cells, has a treelike or retiform formation, and is often locally aggressive without metastases …   Medical dictionary

  • epithelioid hemangioendothelioma — a rare vascular neoplasm occurring in the medium to large veins of the distal extremities of adults, particularly young males; it may be benign or malignant and is characterized by proliferation of epithelioid or histiocytoid endothelial cells… …   Medical dictionary

  • infantile hemangioendothelioma — a rare, benign tumor of the liver in infants, generally multicentric, composed of anastomosing vascular channels lined with thick endothelial cells; it may be associated with disseminated hemangiomatosis, and death often occurs as the result of… …   Medical dictionary

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