Adenoma of the middle ear.

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Abstract
Benign adenoma of the middle ear emerged as a distinct entity following a review of 20 cases as reported from the Armed Forces Institute of Pathology in 1976. We report 4 additional cases and note that the pathologic diagnosis is not so clear cut. Benign primary adenoma may be confused with adenocarcinoma, ceruminoma, and glomus tumor. The otologic surgeon must take a hard look at the clinical signs and symptoms to determine if they are compatible with the diagnosis of primary middle ear adenoma. While middle ear adenoma has recently been implicated as a cause of facial paralysis (including a case herein), bone destruction should never be found in concert with this neoplasm.