In X-ray, loops of bowel on the left side of hemithorax and shift of heart shadow -
Certain malformations result in the defect in the diaphragm which allows the abdominal organs to push into the chest with mediastinal shift to the opposite side.
Such defects are a Bochdalek hernia, Morgagni's hernia and Diaphragmatic eventration.
Eventration of diaphragm
Foramen of bochdalek hernia
Morgagni's hernia
Any of the above