A case of a large peripheral osteoma arising on the lingual side of the mandible

This report describes a pedunculated and peripheral osteoma, measuring 49×31×24mm, that arose at the lingual side of the mandibular molars in a 31-year-old man. This was the largest peripheral osteoma arising on the lingual side that we have resected intraorally and the fourth largest we have examined. We clinically examined this case as compared with 8 other cases of large peripheral osteomas of the mandible reported in the Japanese literature.