食管裂孔疝是指胃通过膈食管裂孔进入胸腔所致的疾病.长期胃酸倒流会侵蚀食道下端.

Schematic diagram of different types of hiatus hernia.
Green is the esophagus, red is the stomach,
purple is the diaphragm, blue is the HIS-angle.
A is the normal anatomy, B is a pre-stage,
C is a sliding hiatal hernia, and D is a paraesophageal type.