How Does My Doctor Know I Have Ewing Sarcoma? X-rays of the Extremities X-rays of the Spine, Neck, or Back Bone Scan Computed Tomography (CT or CAT) Scan of the Bones Magnetic Resonance Imaging (MRI) of the Bones, Joints, and Soft Tissues Bone Biopsy I've Just Been Told I Have Ewing Sarcoma Understanding Your Stage of Ewing Sarcoma