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Cholesterol granuloma of the paranasal sinus is rare, but the closed cavities of paranasal sinuses provide favorable conditions for its development. The proposed pathogenesis of cholesterol granuloma seems to be borne by hemorhages into the sinuses, liberation from degenerating tissue, or transudate. The paranasal sinuses provide closed cavities with a long lymphatic drainage pathway and consequently slow drainage. Since cholesterol granuloma of paranasal sinus have ben reported first in 1978, lete excision by external aproach such as a Caldwel-Luc operation. Recently, authors have experienced a case of cholesterol granuloma developed from the bilateral maxillary sinuses after facial trauma in 42 year-old male patient. We managed this case by transnasal endoscopic sinus surgery successfuly. We report this case with literatures review. (Korean J Otolaryngol 2002;45:408-1 )


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