Teenager with left chest wall mass

CXR and CT of rhabdomyosarcoma of the chest wall
CXR PA and lateral (above) shows an ill defined left-sided pleural-based process. Axial CT without contrast of the chest (below) shows a mass arising from the muscles of the left chest wall which invades up into the pleural space and down into the abdomen, sparing the ribs.

The diagnosis was rhabdomyosarcoma.