Abstract
Recurrent pleomorphic adenomas of the parotid gland warrant consideration because of the potential for facial nerve injury occurring with surgical treatment and the risk of malignant conversion. Forty-eight cases of recurrent pleomorphic adenoma treated at the University of Michigan, Ann Arbor, between 1935 and 1975 were retrospectively analyzed. The results of surgical procedures for recurrence were determined with respect to tumor control and resultant facial nerve function. Malignant conversion developed in three (6%) of 48 cases. The results of this study underscore the importance of adequate surgical excision of initial recurrences as well as primary tumors to prevent tumor recidivism. Tumor control rates and facial nerve preservation are enhanced with formal parotidectomy for recurrent tumor when feasible. In cases in which facial nerve identification and dissection is not possible, en bloc total parotidectomy offers effective, though not absolute, control of extensive recurrence.
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