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The purpose of this report was to describe the radiologic findings in 9 pathologically proved cases of intracranial meningeal hemangiopericytomas in children and adolescents. The average duration of symptoms was short (mean, 4.0 months; median, 1.5 months). Radiologic findings of sinonasal hemangiopericytoma. CT scan (a), MRI scan (b), and MRI angiography (c). A circumscribed, submucosal, heterogeneous soft-tissue mass measuring 5 × 2.4 × 4.5 cm involving the right dorsal nasal cavity, the right ethmoid, and sphenoid sinus as well as the nasopharynx. HPC is a soft tissue neoplasm of mesenchymal origin first described by Stout and Murray in 1942. HPC constitutes 1 % of all vascular neoplasms and has been thought to coexist with trauma, prolonged steroid use, and hypertension.

What is the cell of origin of hemangiopericytomas? Hemangiopericytomas were originally thought to originate from pericytes of … 2017-04-10 Hemangiopericytoma Section. Neuroradiology . Case Type.

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Histology Microscopic Description: Sections show a densely cellular neoplasm composed of closely packed, randomly oriented cells interspersed by n Hemangiopericytoma and Solitary Fibrous Tumors Updated by Boris Hristov BACKGROUND Are hemangiopericytomas benign or malignant lesions? Hemangiopericytomas are considered malignant lesions (sarcomatous lesions associated with blood vessels).

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The diagnosis was confirmed after resection.

641 There are fewer than 30 reported cases of hemangiopericytoma of the kidney, and in at least half of these the tumor involved only the renal capsule or adjacent soft tissues, without renal parenchymal involvement; in Hemangiopericytoma is a rare type of tumor involving blood vessels and soft tissue.
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The US, Doppler and CT appearances in a patient with hemangiopericytoma of the greater omentum Abdominal and Gastrointestinal Radiology Case Report. Hemangiopericytoma is a potentially malignant tumor of vascular origin.

Clinicopathologic aspects and followup studies in 8 cases. Neurology, 1961, 11: 771 – 777. Kruse, F., Jr. Hemangiopericytoma of the meninges (angioblastic meningioma Section of Radiology, University of Pennsylvania, School of Veterinary Medicine, Philadelphia, Pennsylvania. Address reprint requests to Sydney M. Evans, VMD, MS, Section of Radiology, University of Pennsylvania, School of Veterinary Medicine, 3850 Spruce Street, Philadelphia, PA 19104.Search for more papers by this author 1997-09-01 · Although the histogenesis of meningeal hemangiopericytomas (HMP) remains controversial, both biological and clinical evidence seems to identify these neoplasms as a separate entity with respect to 1 Jan 2012 These results suggest that CT and MR imaging findings may be helpful for preoperative diagnosis.
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Central nervous system HPCs are rare. 1 Meningeal HPCs (M‐HPCs) constitute < 2.5 % of all meningeal tumors and < 1 % of all intracranial tumors. 2-4 Solitary fibrous tumors (SFTs) are a rare group of spindle cell neoplasms that include fibrous-to-cellular SFTs and related lesions such as lipomatous hemangiopericytoma and giant cell angiofibroma . SFTs were first described as originating from the pleura [ 2 ] and occurring most commonly in the thoracic cavity [ 3 , 4 ], but it is now recognized that these rare tumors can occur throughout Radiology images.

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Meningeal hemangiopericytoma (MHP) is extremely rare in childhood. Mean age at diagnosis is between 38 and 43 years. We present an 8-year-old boy with MHP of the middle cranial fossa.