Aggressive fibromatosis of the tongue: MR demonstration.

A case of aggressive fibromatosis of the tongue is described in a 9-year-old boy. Magnetic resonance was used in the initial evaluation and revealed a well defined mass in the anterior third of the tongue which was mildly hypointense on a T1-weighted image and minimally hyperintense on a T2-weighted image. Magnetic resonance was useful in indicating the benign nature of the tumor, in defining its extent, and for follow-up after local surgical resection.