Abstract
Idiopathic hemotympanum(blue drum) is a chronic condition in which the entire durm is of a distinct blue color and in which specific etiologic factors have been ruled out. Idiopathic hemotympanum associated with cholesterol granuloma is a relatively uncommon condition in which there is a blue colored tympanic membrane due to a collection within the tympanum of sterile, viscid, chocolate-colored fluid derived from a cholesterol granuloma within the mastoid. The pathogenesis is still controversial. Recently we experienced 13 cases of idiopathic hemotympanum. We treated the 10 cases using simple or complete mastoidectomy with transmastoid ventilation tube, steroid and middle ear ventilation via euctachian tube. Only ventilation tube insertion(3 cases) is inadequate. We represent our cases with the review of literatures and point out the importance of surgical intervention.
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