Sliding
• In a Sliding Hiatal Hernia, the stomach and the section of the esophagus that joins the stomach slide up into the chest through the hiatus. This is the more common type of hernia.
Paraesophageal Hernia - next to the oesophagus
• The paraesophageal hernia is less common, but is more cause for concern. The oesophagus and stomach stay in their normal locations, but part of the stomach squeezes through the hiatus, landing it next to the oesophagus.
• Although you can have this type of hernia without any symptoms, the danger is that the stomach can become "strangled," or have its blood supply shut off.