[Metastasizing pleomorphic adenoma of the parotid. Apropos of a case]

A case of metastasizing pleomorphic adenoma of the parotid in which both the primary tumor and metastasis were composed of benign pleomorphic structures is reported in a 55 year-old white woman. The pulmonary metastasis developed nine years after excision of the primary tumor without local recurrence. No mitotic activity or infiltrative growth pattern were present in the primary tumor. By flow cytometry, DNA content was diploid in both the parotid tumor and the pulmonary metastasis. Previously reported cases are reviewed.