抄録
Vasoformative tumors of the mucous membrane of the nose consistute a distinctive, yet clinically and often pathologically fluctuating, type of lesion.
There are many unsettled questions concerning the exact nature of these lesions, the neoplastic potentiality and implications, and histopatholgocial features.
The benign tumor of the endothelial cells is hemangioma, but the neoplastic nature of the lesion is being challenged.
In the nasal cavity there are several lesions that present microscopic features very similar to those of true hemangiomas; the granuloma pyogeriicum is a tumor-like lesioncharacterized by proliferation of endothelial cells and often indistinguishable from true hemangiomasunder the microscope.
Hemangioma may also repreesent a variety of histopathological patterns appearing like an inflammatory lesion that is traumatic in origin. This study was undertaken in an attempt to find an etiologic factor which might account for the development of the “bleeding polyp”. A review of 50 cases of bleeding polyps of the nasal cavity and the paranasal sinuses revealed only 18 cases of hemangioma. Furthermore, hemangiomas, whether malformation or neoplasmas, are invariably classified according to the histopathological appearance of the primary architecture into the following three categories; capillary, cavernous and hypertrophic or juvenile.
