JAPANESE JOURNAL OF ORAL & MAXILLOFACIAL SURGERY

Vol. 54 No. 12       2008

ISSN: 0021-5163      UBIC: 151-J

ABSTRACT

Pleomorphic adenoma (PA) is the most common salivary gland tumor. Tumors originating from the major salivary glands are frequently located in the parotid gland. In contrast, tumors originating from the minor salivary glands are frequently found in the palatal region. PA occurring in the lips, especially the lower lip, is relatively rare. In this paper, we present 2 cases of PA arising in the upper hp and lower lip, respectively. The first case arose in a 72-year-old woman. The patient visited a dental clinic because of swelling of the left side of the upper lip and was referred to our department. Palpation revealed a painless movable mass. The lesion was 15 mm in diameter and located in the subcutaneous tissue on the left side of the upper lip. The second case was in a 60-year-old man. This patient visited a dental clinic because of swelling of the left side of the lower lip and was referred to our department. Palpation revealed a painless movable mass. The lesion was 13 mm in diameter and arose in the subcutaneous tissue of the left side of the lower lip. The clinical diagnosis in both cases was a benign tumor of the lip. Surgical resection was performed under local anesthesia in both patients, and the histopathological diagnoses confirmed PA. In both patients, the upper and lower lips healed well after the operation. About 1 and a half years after surgery, there was no evidence of recurrence. Keywords: pleomorphic adenoma, minor salivary gland, upper lip, lower lip.

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