الفهرس 
Introduction and aim of the workOnly 14 pages are availabe for public view
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Abstract
Nasopharyngeal angiofibroma (fifteen patients): In summary we found that the preoperative embolization of nasopharyngeal angiofibroma had a marvelous effect in controlling the intraoperative bleeding of the tumour as well as in minimizing the amount of the intra operative blood loss. Meningioma (seventeen patients): In our study preoperative embolization of meningioma was successful in six patients who had convexity meningioma with average amount of intraoperative blood loss ranged from 100500 ml. In these six patients, meningioma had predominantly meningeal blood supply in five patients and balanced pial and meningeal blood supply in the last patient. While embolization was failed in the remaining eleven patients who had purely pial blood supply. Paraganglioma (eight patients): Preoperative embolization procedure was successful in six patients had glomus tumors (four patients had glomus jagulare, one patient had glomus tympanicum and the last patient had glomus jagulotympanicum) as the amount of the intraoperative blood loss ranged from 100700 ml. Hemangioma (three patients): Out of three patients had hemangioma in the face, one patient had venous hemangioma of the upper lip was successfully embolized by direct percutaneous injection using 95% ethyl alcohol. Vascular malformation (two patients): Embolization was successful in one patient had vascular malformation in the right side of the jaw supplied by hypertrophied lingual artery as the lesion was completely disappeared in the post embolization angiography. Embolization was failed in the second patient due to markedly hypertrophied feeding artery. Aneurysms ( two patients ) :? Two patients in our study had external carotid artery aneurysms. Embolization was successful in one patient and failed in the other patient due to the large size of the aneurysm. Conclusion: In conclusion our study agreed that preoperative embolization of vascular head and neck lesions plays an important role in controlling the intraoperative bleeding, minimizing the amount of the intraoperative blood transfusion, lowering the risk of tumour recurrence as well as it is a curative procedure in some vascular lesions such as epistaxis and hemangioma.