Angiofibroma (angiofibroma; synonym: fibroangioma, sclerosing angioma)- the tumor type angioma, in which a lot of fibrous connective tissue, or fibroids with a large number of vessels.
The tumor usually boundaries are not clear; it is growing on a broad basis, has a milder compared to the fibroid consistency, elastic, blue (the color intensity is dependent on the degree of vascularization of the tumor). Microscopically is determined by a large number of unevenly spaced blood vessels of different caliber: from the smallest capillaries to large slit-like cavities and caverns (fibroma teleangioectaticum, cavernosum). Vessels for the most part is lined with a single layer of endothelial; possible hyperplasia of endothelial cells with the formation of multilayer pavement, and sometimes papillary ridges. Elastic fibers in the walls of blood vessels almost never occur. Another component of the tumor is fibrous stroma, mainly well-developed collagen and partially elastic fibers with a small number of cellular elements. In the walls of blood vessels possible fibrinoid necrosis, in stroma - necrosis, hyalinosis, inflammatory changes.
In the tumor hemorrhage observed, hemosiderin deposits.
The most frequent place of tumor development is nasopharynx (see Throat, tumors). Treatment - see Angioma.