Abstract
Seven benign tumors in the external auditory canal were studied clinicopathologically. These cases included 3 adenomas, 1 osteoma, 1 melanoma, 1 histiocytosis and 1 epidermal cyst. Although the degree of both acinus and duct formation varied in all cases with adenoma, apocrine secretion was observed as a common histological finding. These findings tend to support the concept that all adenomas originate in ceruminous glands along the external auditory canal. To date, there has been no recurrence following the surgery. Both the histiocytosis and epidermal cyst were reported as rare cases in the region of the external auditory canal. No evidence of malignancy as invasion and/or recurrence was observed clinicopathological ly in this case of histiocytosis.
