hemangiopericytoma


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hemangiopericytoma

 [he-man″je-o-per″ĭ-si-to´-mah]
a tumor composed of spindle cells with a rich vascular network, which apparently arises from pericytes.

he·man·gi·o·per·i·cy·to·ma

(he-man'jē-ō-per'i-sī-tō'mă),
An uncommon vascular, usually benign, neoplasm composed of round and spindle cells that are derived from the pericytes and surround endothelium-lined vessels; malignant hemangiopericytomas are difficult to distinguish microscopically from the benign.
[hemangio- + pericyte + G. -oma, tumor]

hemangiopericytoma

/he·man·gio·peri·cy·to·ma/ (he-man″je-o-per″ĭ-si-to´mah) a tumor composed of spindle cells with a rich vascular network, which apparently arises from pericytes.

he·man·gi·o·per·i·cy·to·ma

(hē-man'jē-ō-per'i-sī-tō'mă)
An uncommon vascular, usually benign, neoplasm composed of round and spindle cells that are derived from the pericytes and surround endothelium-lined vessels.
Synonym(s): haemangiopericytoma.

hemangiopericytoma

(hēman´jēōper´isītō´mə),
n a vascular tumor composed of pericytes.

hemangiopericytoma

a tumor composed of spindle cells with a rich vascular network, which apparently arises from pericytes. See also schwannoma.
References in periodicals archive ?
Tumor-induced osteomalacia is rare, but when it occurs is most commonly caused by benign phosphaturic mesenchymal tumors among which hemangiopericytoma is the primary one (5).
Hemangiopericytoma, first described and named by Stout and Murray in 1942, (1) is an uncommon spindle-cell tumor that pathologically displays a thin-walled vascular branching pattern.
2x4 cm Mass in anterior mediastinum with external compression to left atrium, 3x4 cm Isointense to myocardium on T1 and hyperintense on T2 weighted images, peripheric contrast enhancement with central necrosis Patients Final Diagnosis 1 * Rhabdomyoma 2,3 * Lipoma 4,5,6 Eustachian valve 7-10 * Myxoma 11 Myxoma with malignant transformation 12 * Aortic valve papillary fibroelastoma 13-17 * Papillary fibroelastoma 18 * Papillary fibroelastoma 19 Metastases 20 Thrombus 21 Thrombus 22 Thrombus 23 * Hemangiopericytoma MR--magnetic resonance Asterisk (*) indicates operated and pathologically proven cases
The interrelationship of these two types of tumors, their common (vascular) etiology, and occupational exposure to increased VCM concentrations in both patients lead to the conclusion that the onset of hemangiopericytoma (probably primarily in the liver) may be associated with long-term occupational exposure to VCM.
In this article, we describe our use of this approach to excise an extensive sinonasal hemangiopericytoma involving the left maxillary sinus, the left ethmoid sinus, and both frontal sinuses.
Myofibromatosis-like hemangiopericytoma metastasizing as differentiated vascular smooth-muscle and myosarcoma: myopericytes as a subset of "myofibroblasts".
Hemangiopericytoma is a tumor of uncertain histogenesis.
The differential diagnosis of cardiac SS includes carcinosarcoma, malignant mesothelioma, leiomyosarcoma, hemangiopericytoma, and MPNST.
The differential diagnosis included primary calcifying extraperitoneal neoplasms like malignant fibrous histiocytoma, malignant mesenchymoma leiomyosarcoma, liposarcoma, osteosarcoma, and, rarely, hemangiopericytoma.
Insulin-like growth factor II expression in primary meningeal hemangiopericytoma and its metastasis to the liver accompanied by hypoglycemia.
26) Otherwise, the histologic differential diagnosis includes squamous cell carcinoma, hemangioma, giant cell fibroblastoma, hemangiopericytoma, or other types of heterotopic neuroglial lesions, and even these are often easily ruled out.
Lesions included adnexal neoplasm, ameloblastic fibro-odontoma, basal cell carcinoma, benign fibrous histiocytoma, blue nevus, chondrosarcoma, compound nevus, epithelioma adenoides cysticum, esthesioneuroblastoma, Ewing sarcoma, fibrosarcoma, giant cell granuloma, granulocytic sarcoma, hemangioma, hemangiopericytoma, Langerhans cell histiocytosis, lymphangioma, lymphoma, melanoma, neuroblastoma, neurofibroma, ossifying osteofibroma, osteochondroma, osteosarcoma, port wine stain, rhabdomyosarcoma, Spitz nevus, and xanthogranuloma.