Firm, nonulcerated mass in the maxillary gingiva

A firm mass of tissue in a 52-year-old male was diagnosed as peripheral fibroma with metaplastic bone formation. Several terms have been used to describe this type of lesion, which is similar in appearance to the peripheral odontogenic fibroma. The lesions should be excised and removed tissue submitted for microscopic examination. Special care should be taken to remove the attachment because the lesions may recur. The prognosis is excellent.