Abstract
Actinomycosis is an uncommon specific inflammation in the maxillofacial region, particularly arising in soft tissue around the mandible. In this paper, we report a case of maxillary actinomycosis with severe bone destruction and suspected malignant tumor. A 37-year-old man was referred to our hospital because of pain in the left molar region of the maxilla. Radiographic examination showed progressive bony destruction at the left maxillary sinus and alveolar process that were well enhanced by Gadolinium on the MRI. The clinical diagnosis was malignant tumor of the left maxillary sinus. Biopsy was performed under general anesthesia. Intraoperative frozen-section pathological examination revealed that it was inflammatory granulation tissue without malignancy. Accordingly, the operation was subsequently changed to sequestrectomy. Histological diagnosis of the permanent specimens was actinomycosis. No further signs or symptoms have been noted as of 48 months after surgery.
