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Salivary Gland Choristoma of the Middle Ear in a Child: A Case Report

Salivary gland choristoma is a heterotopic rest of histologically normal salivary gland tissue. According to Ha et al,1 only 24 cases have been reported in the literature since the first description by Taylor and Martin in 1961.2 Because most of these ectopic rests occur in the middle ear, they should be distinguished from other mass lesions in the middle ear cavity, such as middle ear cholesteatoma, facial neuroma, and glomus tumor. This lesion does not require total removal because there is no potential for further growth or malignant change.3 We present the case of a 1-year-old girl with a salivary gland choristoma in the middle ear. Because the right middle ear mass appeared whitish and located behind the intact tympanic membrane, we first suspected it to be congenital middle ear cholesteatoma. Exploratory tympanotomy, however, revealed a salivary gland choristoma that adhered tightly to the facial nerve. Differential diagnosis and treatment of this rare condition are discussed.