This x-ray shows a malignant bone tumor (Ewing's sarcoma) of the upper arm bone (humerus). This type of tumor usually occurs during childhood and adolescence.
Update Date 3/23/2014
Updated by: Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.