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Hemangiopericytoma is an aggressive mesenchymally derived tumor with oval nuclei with scant cytoplasm. There is dense intercellular reticulin staining. Tumor cells can be fibroblastic, myxoid, or pericytic. These tumors, in contrast to meningiomas, do not stain with epithelial membrane antigen.
Histology must be used to make the diagnosis because the tumor may be hard to differentiate from other neoplasms with similar characteristics. [7] Histologically, hemangiopericytoma is characterized by staghorn-shaped blood vessels and sponge-like sinusoidal vasculature that are randomly linked and encircled by ovoid, short spindle-shaped cells. [8]
Image of a solitary fibrous tumour that is most likely a hemangiopericytoma. It surrounds a staghorn-shaped blood vessel, which results from the arrangement of pericytes around the vessel. Hemangiopericytoma is a rare vascular neoplasm, or abnormal growth, that may either be benign or malignant. In its malignant form, metastasis to the lungs ...
Targetoid hemosiderotic hemangioma manifests as a single, tiny, reddish-violaceous to brown targetoid lesion that can grow centrifugally in the acute phase is encircled by a hemorrhagic halo. [3]
Thomas was killed on Jan. 31 in an incident that Troy police and fire officials have described as a fiery explosion in the chamber. Speaking for the first time about the case on Friday, Harrington ...
L.A. firefighters look for hot spots as they prepare for high winds in the burn areas of the Palisades fire on Tuesday, Jan. 14. (Brian van der Brug/Los Angeles Times)
Juan Manuel Sierra, 33, a.k.a. Juan Manuel Sierra-Leyva, was arrested last Thursday after 'attempting to start a fire' with a blowtorch in a West Hills neighborhood, authorities said.
Cerebral cavernous malformation (CCM) is a cavernous hemangioma that arises in the central nervous system.It can be considered to be a variant of hemangioma, and is characterized by grossly large dilated blood vessels and large vascular channels, less well circumscribed, and more involved with deep structures, with a single layer of endothelium and an absence of neuronal tissue within the lesions.