This report describes a case of nodular fasciitis occurring in the oral floor of a 24-year-old man. He clained the swelling had gradually appeared 2 months previously, with no obvious cause. At initial examination, an elastic soft tumor the size of the forefinger-tip, was discovered under the normal oral floor mucosa. The tumor was removed surgically. It was not attached to the surrounding tissue and was able to be extirpated easily.
The histopathological diagnosis was nodular fasciitis. Nodular fasciitis arising from intraoral tissue is rare, especially in the oral floor. Only 3 cases, including ours, have been reported in Japan.
