Gastroesophageal and gastric ultrasound in children: the state of the art.

In previous years, the role of gastroesophageal (GE) ultrasound as a diagnostic tool in gastroesophageal reflux disease (GERD) has been disputed. Most authors believe that it is difficult to diagnose GERD without correlation studies between esophageal pathology and ultrasonographic signs. Indeed, there are many anatomic descriptions of the normal GE junction. The fact that GERD diagnosis was made by morphological studies was believed to be an incorrect deduction. We revisit the pathophysiologic data concerning the gastroesophageal junction and gastric function and review the data in the literature of the past 30 years.