FIGURE 11-25. Ameloblastic fibroma. a and B, Plain radiographs show radiolucent sion with solid, thick is cortical expansion and focal circular area of perforation. C and D,CT images show that the cortex is thickened and intact in ramus (c), and there are apparent multiple perforations in body of mandible with selected window (D). E and F, Axial CT and magnetic resonance contrast study on same plane of indicates area of increased signal in region corresponding to lesional tissue. On close scrutiny of axial CT scan (E) at a slightly different window, a very thin, almost imperceptible layer of subperiosteal bone is seen. Magnetic resonance contrast study shows that the lesional tissue is confined to the area within the thin line of bone