Imaging characteristics of aggressive fibromatosis in children

Aggressive fibromatosis (AF) is a benign, non-metastatic proliferation of fibroblasts in the musculoaponeurotic compartment that tend to infiltrate locally and recur after surgical resection. Wide local excision with adequate clear margins is the treatment of choice. Magnetic resonance imaging (MRI) and computed tomography (CT) are excellent in delineating the extent and depth of these lesions. Thus they play an important role in the surgical management of these patients. There are a few descriptions of the MRI characteristics of these lesions in children. Radiographically, our cases are typical of others described in the literature-hypointense on T1-weighted images and hyperintense on T2-weighted images.