A Case of Actinomycosis of the Minor Salivary Gland in the Buccal Region

We report a case of actinomycosis arising in the minor salivary gland in the buccal region. A 71-year-old male presented with a swelling in the left buccal region. The clinical diagnosis was minor salivary gland tumor in the buccal mucosa. Under local anesthesia, the lesion was excised. Histopathological examination showed basophilic amorphous masses of Actinomyces in the dilated excretory duct with squamous metaplasia. A final diagnosis of actinomycosis was made. Its portal of entry was thought to be a disruption of the mucosal barrier after trauma due to maladaptation of dentures. There was no sign of recurrence after the surgery.