Figure 20a. Chest wall rhabdomyosarcoma in a 2-year-old boy with dysphonia and Horner syndrome. (a) Coronal T2-weighted MR image (5,000/90) shows a cervicothoracic mass with supraclavicular extension and displacement of the trachea (arrowhead). (b) Contrast-enhanced axial CT scan shows chest wall involvement. Note that the first rib is partially destroyed (arrow).