抄録
Actinomycosis is an uncommon chronic granulomatous infection. Typical symptoms of this infection are multiple abscess formation, plate-like induration and trismus. Recently, this infection has been difficult to diagnose because of the lack of typical symptoms. We report a rare case of actinomycosis mimicking the clinical appearance of a benign tumor in the lower lip.
The patient was an 85-year-old man who noticed a swelling and spontaneous pain in the left lower lip region. The mucosal surface of the left lower lip was white in color with a small yellow, elastic hard tumor, measuring 11mm in diameter. We diagnosed a tumor of the left lower lip and performed excisional biopsy of the region. Histopathologically, actinomycotic colonies were identified, and actinomycosis was diagnosed. However, the mass persisted even after the surgical treatment. An amoxicillin formulation was therefore administered until the mass disappeared. At 3 months postoperatively, there was no sign of any recurrence.
