Inflammed hernia
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Inflamed Hernia
Definition
An inflamed hernia is a specific clinical type of hernia in which the contents of the hernial sac become acutely inflamed. It is a very rare condition that closely mimics strangulated hernia in its presentation.
- S Das: A Manual on Clinical Surgery, 13th Ed.
Causes of Inflammation Inside the Sac
The hernia becomes inflamed because the herniated organ itself undergoes acute inflammation:
| Herniated Content | Pathology |
|---|---|
| Appendix | Acute appendicitis within the sac (Amyand's hernia) |
| Salpinx (fallopian tube) | Acute salpingitis / pelvic inflammatory disease |
| Meckel's diverticulum | Meckel's diverticulitis (Littre's hernia variant) |
| Omentum | Omental torsion or omentitis |
The inflammation spreads from the visceral content to the sac, then to the overlying subcutaneous tissue and skin.
Clinical Features
- Local signs of inflammation:
- Overlying skin becomes red, oedematous, and shiny
- Swelling becomes painful, tender, and swollen
- Constitutional/systemic disturbances are present:
- Fever, malaise, elevated WBC
- The swelling is NOT tense (unlike strangulated hernia)
- There are NO features of acute intestinal obstruction (unlike strangulated hernia)
- The hernia remains partially or fully reducible in some cases
Key Differentiating Feature from Strangulated Hernia
This is the most important distinction:
| Feature | Inflamed Hernia | Strangulated Hernia |
|---|---|---|
| Tenderness | Present | Present |
| Skin redness/oedema | Present | Present (late) |
| Tense / taut swelling | Absent | Present |
| Intestinal obstruction | Absent | Usually present |
| Impulse on coughing | May be present | Absent |
| Blood supply compromised | No | Yes |
| Constitutional signs | Fever, local infection | Systemic toxicity, shock |
The single most important differentiating feature is that an inflamed hernia is not tense and has no intestinal obstruction, whereas a strangulated hernia is extremely tense and associated with bowel obstruction.
- S Das: A Manual on Clinical Surgery, 13th Ed.
Pathological Progression - Hernia Complication Spectrum
Understanding inflamed hernia requires placing it in the broader context of hernia complications (Bailey & Love):
- Reducible - contents come and go freely
- Irreducible - contents cannot be returned; no vascular compromise
- Obstructed/Incarcerated - irreducible + intestinal obstruction; NO interference with blood supply
- Strangulated - irreducible + obstruction + arrest of blood supply (ischaemia/gangrene) - emergency surgery
- Inflamed - contents inflamed from within (e.g., appendicitis, salpingitis); not tense; no obstruction
- Infarcted - gangrenous contents; very high mortality
Management
- Emergency surgical exploration is the standard approach
- The inflamed content (e.g., the appendix) is dealt with at the same time as the hernia repair
- Since inflammation can progress to perforation, spread to peritoneum, or be confused with strangulation, early surgery is warranted
- Antibiotic cover is initiated preoperatively
Classic Example: Amyand's Hernia
An inflamed appendix inside an inguinal hernia sac (Amyand's hernia) is the prototype. Approximately 1% of inguinal hernias contain the appendix within the sac. When the appendix becomes inflamed inside the sac, this constitutes a classic inflamed hernia. The presentation can be indistinguishable from strangulation without surgical exploration.
- Yamada's Textbook of Gastroenterology, 7th Ed.
Summary Points
- Inflamed hernia is a rare but recognized clinical type of hernia complication
- It is caused by intra-sac organ inflammation (appendicitis, salpingitis, Meckel's diverticulitis)
- It mimics strangulated hernia but is distinguished by absence of tense swelling and no intestinal obstruction
- Constitutional signs (fever) and local inflammatory signs (red, oedematous skin) are present
- Treatment is surgical - address both the inflamed organ and the hernia defect
- The danger lies in misclassification - always assume strangulation until proven otherwise at operation
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