Key Points Development of the lung as a derivative of the upper gastrointestinal tract. Predisposition of anatomy of the lungs to aspiration of food, saliva, and vomitus. Development of four-chambered ...

Planar 99mTc-labeled RBC scintigraphy is sensitive for detection of acute gastrointestinal (GI) bleeding but its accuracy for localization of a bleeding source is arguable, particularly in patients ...

Air enters the GI tract via the tracheoesophageal fistula and the newborn presents clinically with a gas-filled abdomen and frequent aspiration pneumonias due to gastric reflux into the respiratory ...

The precise pathogenesis of NEC is elusive. For a brief review of GI anatomy and physiology, see Sidebar 2. As early as 1975, the triad of GI mucosal injury, presence of bacteria in the gut, and ...