Primary pleomorphic adenoma (chondroid syringoma) of the external auditory canal. Case report and literature review

Chondroid syringoma of the external auditory canal is an extremely rare neoplasm, representing the cutaneous counterpart of pleomorphic adenoma of salivary glands. This tumour is thought to derive from the apocrine duct of the folliculo-sebaceous-apocrine unit. We report the case of a 68-year-old male in whom the clinical and radiological examinations showed a well-circumscribed tumour limited to the external auditory canal. The diagnosis was confirmed by histologic examination. We also reviewed the literature.