Mucoepidermoid Carcinoma of the Lower Labial Mucosa: A Case Report

Mucoepidermoid carcinoma (MEC) represents the most common malignant salivary gland neoplasm, yet its occurrence in the lower labial mucosa remains exceptionally rare. Early detection is challenging due to frequent mimicry of benign conditions. A 68-year-old male tobacco user presented with a 1-month history of painful ulceration on the lower right labial mucosa. Clinical examination revealed a 1 cm irregular, indurated ulcer with keratotic changes. Toluidine blue staining showed dysplasia, and histopathology confirmed intermediate-grade MEC. The lesion was successfully excised with clear margins. This case highlights the diagnostic challenges of minor salivary gland malignancies in atypical locations and emphasizes the importance of histopathological confirmation for persistent oral ulcers in high-risk patients.