Infant who had undergone emergency thoracotomy for cardiac massage during a cardiac arrest 6 months before and now has a lump under the left arm

CXR of pulmonary herniation — CXR AP in inspiration (above) shows the left 5th intercostal space at the side of the previous thoracotomy to be deformed. CXR AP in expiration (below) shows interval development of a cystic structure in the soft tissues of the left chest wall.

The diagnosis was pulmonary herniation through the left 5th intercostal space secondary to incorrectly repaired thoracotomy incision.