Fig. 6

Florid reactive periostitis. On lateral X-rays view (a), a soft-tissue swelling is noted in contiguity with the volar aspect of the distal humerus. On axial (b) and sagittal (c) CT images, a partially mineralized mass with peripheral calcifications and mild periosteal thickening is noted. No cortical discontinuity is seen. Three months later, peripheral calcifications become more prominent, as shown in axial (d) and sagittal (e) CT images. Florid reactive periostitis ossificans was pathologically proven. Arrow points at the lesion in all images