PLEOMORPHIC ADENOMA OF THE LOWER LIP WITH EXTENSION TO THE COMMISURE: A RARE CASE REPORT AND A REVIEW OF THE LITERATURE.

Abstract

Pleomorphic adenoma is the most common benign salivary gland tumor, typically affecting the parotid and minor salivary glands of the palate and upper lip. Its occurrence lower lip is exceptionally rare and poorly documented in the literature. We report a rare case of pleomorphic adenoma in a 62-year-old female who presented with a painless, slowly enlarging nodular swelling of lower lip. Clinical examination revealed a firm, well-circumscribed mass measuring 1.5 cm in its widest dimension. Differential diagnoses included fibroma, fibrolipoma, and fibrosed mucocele. The lesion was excised via an intraoral approach under local anesthesia. Histopathological examination confirmed pleomorphic adenoma. No recurrence during a three-year follow-up. Pleomorphic adenomas of the lower lip are rare, with few cases reported. The lesion typically grows slowly. Diagnosis relies on clinical suspicion and histopathology. This case emphasizes the importance of including pleomorphic adenoma in the differential diagnosis of lower lip swelling.