Abstract
Clinically, there are many diseases that provoke disturbance of mouth opening. Among them, disturbance of mouth opening by fibrous dysplasia of the mandibular condyle is very rare. We report a case of fibrous dysplasia with chief complaint of disturbance of mouth opening who experienced complication of the osteitis of the mandible during the course. The patient was a 30-year-old man, who was referred to our hospital. Panoramic radiography findings suggested fibrous dysplasia. We carried out further examination by CT and biopsy of the mandible, and diagnosed it as fibrous dysplasia. During the course, the patient sometimes complained of pain and swelling of the mandible, so we considered a complication of the osteitis of the mandible, and took a blood sample, and CT and MR images. The results for the blood sample were almost within normal limits, but CT and MR images partially revealed inflammation of the mandible. We prescribed antibiotics, and the pain and swelling of the mandible decreased. From the above, complication of the osteitis and fibrous dysplasia were suggested. As acute pain and swelling in fibrous dysplasia is considered to be a sign of malignant conversion, we should follow the patient with close observation.
