Cranial fasciitis of childhood.

Cranial fasciitis is a benign fibroblastic tumor of the skull found almost exclusively in young children. It is histologically identical to nodular fasciitis. We present the clinical, radiologic, and pathologic findings of a 7-month-old male infant with cranial fasciitis of the skull. Herein, we include the first description of this entity's diffusion-weighted imaging appearance. Although rare, cranial fasciitis can mimic more aggressive processes both clinically and radiographically.