High-yield map
Key points before the detail
- 01
Type I slides; type II rolls beside the oesophagus; type III is mixed; type IV contains other viscera.
- 02
Sliding hernia is primarily reflux-associated.
- 03
Pain, retching, obstruction and physiological deterioration suggest volvulus or strangulation.
- 04
CT is the key acute study when ischaemia or complex intrathoracic anatomy is suspected.
- 05
Not every asymptomatic paraoesophageal hernia requires surgery.
1. Classification
| Type | Anatomy | Clinical relevance |
|---|---|---|
| I — sliding | GO junction and proximal stomach move above the diaphragm. | Most common; reflux associated. |
| II — paraoesophageal | Fundus herniates beside the oesophagus while GO junction remains below diaphragm. | Mechanical symptoms, bleeding, obstruction or volvulus. |
| III — mixed | GO junction and a large part of stomach are intrathoracic. | Reflux plus mechanical risk. |
| IV | Other viscera also herniate. | Complex giant hernia requiring specialist assessment. |
2. Why symptoms occur
- Loss of crural support weakens the anti-reflux barrier.
- An intrathoracic stomach can twist or become intermittently obstructed.
- Cameron erosions at the diaphragmatic pinch may cause chronic iron-deficiency anaemia.
- Large hernias can cause early satiety, dyspnoea or reduced exercise tolerance.
3. Recognise acute volvulus or strangulation
- Sudden severe chest or epigastric pain.
- Retching, vomiting or inability to vomit.
- Dysphagia, haematemesis, sepsis or shock.
4. Investigation
| Test | Role |
|---|---|
| OGD | Assesses oesophagitis, Barrett mucosa, ulcer, tumour and Cameron lesions. |
| Barium swallow | Defines GO-junction position, hernia size, rotation and obstruction. |
| CT chest/abdomen | Best for acute pain, suspected volvulus/strangulation or type IV hernia. |
| Manometry/reflux monitoring | Selected pre-operative physiology and reflux confirmation. |
5. Management depends on phenotype
- Asymptomatic sliding hernia needs no hernia-specific treatment; treat attributable GORD.
- Symptomatic paraoesophageal/mixed hernia merits specialist upper-GI review.
- Completely asymptomatic type II–IV disease is not an automatic operation; balance anatomy, frailty, risk and preference.
- In acute obstruction, resuscitate, keep nil by mouth and involve upper-GI surgery urgently; repeated blind nasogastric force is unsafe.
6. Principles of repair
- Reduce stomach and herniated viscera.
- Assess viability and resect non-viable tissue if necessary.
- Dissect the sac and restore adequate intra-abdominal oesophageal length where possible.
- Close the crura without excessive tension; mesh is selective.
- Add an anti-reflux procedure or gastropexy according to physiology, emergency context and patient factors.
Active recall
Close the notes and answer these
Try each question from memory before revealing the answer. These public prompts are a small preview of the integrated retrieval system inside SurgAtlas.
01Which hiatus hernia type is the classic sliding hernia?
Type I.
02What distinguishes type II paraoesophageal hernia?
The fundus herniates beside the oesophagus while the gastro-oesophageal junction remains below the diaphragm.
03What chronic blood abnormality can Cameron lesions cause?
Iron-deficiency anaemia.
04What is the key imaging test in acute suspected volvulus or strangulation?
Urgent CT of chest/abdomen.
05Do all asymptomatic paraoesophageal hernias require surgery?
No. Management is individualised according to anatomy, age, frailty, operative risk and patient preference.
Sources & editorial basis
References & editorial basis
- SurgAtlas production source. General Surgery — Hiatus Hernia. Public lesson curated from the corresponding production chapter.
- SurgAtlas source register. Uses current upper-GI and hernia guidance; elective and emergency decisions are individualised through specialist upper-GI practice.
This lesson is derived from the corresponding SurgAtlas production teaching material. Where the source makes current management or guideline claims, the public lesson uses the cited contemporary guidance. It is written for education and examination preparation, not as patient-specific clinical advice.
Editorial details
Medical Doctor (MD) · MRCS Part A · Physician · Surgical Educator
SurgAtlas is an educational resource. For patient care, verify current national guidance, local antimicrobial and transfusion policies, specialty pathways and individual patient factors.
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