Fig. 1

A young patient in his twenties with a myofibroma in the right body of the mandible. a and b: Axial unenhanced MDCT images show a well-defined round lesion on the lateral margin of the mandible, with periosteal reaction (white arrows) and resorption of the external cortical bone (black arrows). c and d: The lesion shows marked enhancement on axial arterial- and venous-phase contrast-enhanced MDCT images and greater enhancement is seen in the venous phase. e: Photomicrograph (HE, × 100) demonstrates a large number of interlacing bundles of spindle-shaped cells (☆) with tapered blunt-ended nuclei and eosinophilic cytoplasm; hemangiopericytoma-like pattern of the blood vessels (arrows) is focally seen. f: Inflammatory cells (☆) are also present in the lesion (HE, × 100)