X-ray and MRI forearm examination. 1.a. AP radiograph of the distal forearm. Lamellar periostosis of the radius bone associated with diffuse bone structure change and an area of reduced bone density (a) are seen. 1.b, c. MRI forearm examination. Sagital FS T1 shows inhomogeneous tumor with irregular contours with diffuse post contrast enhancement and osseous invasion (b). MRI coronal section T1TSEfs shows post contrast better highlighting of the osseous invasion (c).