School ager post intubation

CXR of endotracheal tube in left mainstem bronchus
CXR AP (left) shows the tip of the endotracheal tube projecting over the left mainstem bronchus. CXR AP (middle) shows the tip of the endotracheal tube projecting over the right mainstem bronchus. CXR AP (right) shows the tip of the endotracheal tube projecting above the carina.

The diagnosis was endotracheal tube malfunction with the endotracheal tube placed initially in the left mainstem bronchus, then in the right mainstem bronchus and finally in the trachea above the carina.