중이에 발생한 타액선 분리종 1례

Although Salivary gland choristoma of the middle ear is a rare congenital benign disease which develop conductive hearing loss, it is frequently associated to ossicular and facial nerve anomalies of which the otologist should be aware. The mechanism of development of salivary gland choristoma of the middle ear is unknown. As growth or malignant change of the tumor has not been reported yet when biopsy has revealed normal salivary gland tissue, complete resection of the tumor is not recommended if the facial nerve may be injured. We report a case of salivary gland choristoma of the middle ear and reviewed several literatures.