Figure 5. (a) An extrapleural soft tissue mass in an 18-year-old man is seen adjacent to the anterolateral chest wall at the mid-thoracic level. (b) A section through the lower thorax, at bone window settings reveals scalloping of the inner margin of the ribs by the extrapleural mass. Erosion of the pedicle and body of D8 with bilateral paravertebral abscesses was the cause of pronounced tenderness along the spine.