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：Lymphoepithelial cysts occasionally develop in the oral cavity, especially the sublingual area or floor of the mouth. We report a case of a lymphoepithelial cyst which developed in the lower right oral vestibule. The patient was a 79-year-old male who noticed a swelling in the right lower oral vestibule. The tumor was border clear, elastic soft. We excised the swelling with surrounding tissue in the local anesthesia. Histopathological diagnosis was a lymphoepithelial cyst.