a) Paraesophageal hiatus hernia
b) Sliding hiatus hernia
c) Both sliding and paraesophageal hernia
d) Large part of stomach in the mediastinum with pylorus near the esophageal hiatus
Hiatal hernias are protrusion of stomach through a defect in the esophageal hiatus into the mediastinum.
They are of two types
- Sliding - GE junction migrates to the mediastinum and rests superior to the diaphragm.
- Paraesophgaeal - Part of stomach migrates through the esophageal hiatus into the mediastinum with GE junction remaining at its normal position.
- There are IV types of hiatal hernia
Type I Sliding hernia
Type II Paraesophageal hernia
Type III - Both Type I and Type II together, both GE junction and stomach are in the medistiunum.
Type IV -Most part of the stomach (more than 1/3rd of stomach) in the mediastinum . This is also known as giant hiatus hernia
Sliding hiatus hernias are very common and often do not lead to symptoms. Mostly they require no treatment. Paraesophageal hernias may require surgery if they produce symptoms.