Figure 5e. Stage IV thoracic neuroblastoma in a 4-year-old boy. (a) Chest radiograph shows a posterior mediastinal mass (arrowheads). (b) Axial contrast-enhanced T1-weighted fat-saturated image demonstrates involvement of the spinal canal and vertebral body. (c, d) Fast SE STIR whole-body MR images demonstrate a paraspinal mass (arrowheads) and multiple focal bone marrow lesions (arrows) that were not present on bone (e) or metaiodobenzylguanidine (MIBG) (f) scintigrams.