Asymptomatic young adult 12 hours after placement of a nasogastric tube during cardiac surgery whose position was not checked after placement

CXR of nasogastric tube tip in the left mainstem bronchus
CXR AP shows the tip of the nasogastric tube to be in the left mainstem bronchus.

The diagnosis was nasogastric tube malfunction with the tip of the nasogastric tube in the left mainstem bronchus.