Tumefactive fibroinflammatory lesions of the head and neck.

Tumefactive fibroinflammatory lesions of the head and neck are idiopathic, histologically benign, tumor-forming lesions that clinically stimulate malignancies. Their histopathologic appearance is nearly identical to that of fibrosclerotic lesions of the mediastinum and retroperitoneum and Riedel's thyroiditis, and in some cases, a congeneric (periarteritis) origin is postulated. There is no optimum treatment, and recurrence and persistence are common. The suggested initial treatment is corticosteroid administration.