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Masked mastoditis is a condition of slow destruction of mastoid air cells but without the acute signs and symptoms often seen in acute mastoiditis. There is no pain, no discharge, no fever and no mastoid swelling but mastoidectomy may show extensive destruction of the air cells with granulation tissue and dark gelatinous material filling the mastoid. It is not surprising to find erosion of the tegmen tympani and sinus plate with an extradural or perisinus abscess. Its occur commonly in infants and characterized by the symptom of a gastrointestinal intoxication and otitis media. == Aetiology == The condition often results from inadequate antibiotic therapy in term of dose, frequency and duration of administration . Most often it results from use of oral penicillin given in cases of acute otitis media when acute symptoms subside but smouldering infection continues in the mastoid. No evidence of bacterial viral parasitical pathogen cause effect an masked mastoiditis. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Masked mastoiditis」の詳細全文を読む スポンサード リンク
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