paraesophageal hiatal hernia

"rolling hiatal hernia," "parahiatal hernia"

1% of hiatal hernias
portion of stomach superiorly displaced into the thorax with the esophagogastric junction remaining in the subdiaphragmatic position

Findings:

cardia in normal position
herniation of portion of the stomach anterior to esophagus
frequently nonreducible
may be associated with gastric ulcer of lesser curvature at level of diaphragmatic hiatus