Amyand hernia

Last revised by Andrew Murphy on 29 Mar 2024

Amyand hernias (alternative plural: herniae) are a rare form of inguinal hernia in which the vermiform appendix is located within the hernial sac. They are seen in less than 1% of inguinal hernias. 

It should not be confused with an appendix-containing femoral hernia, known as a De Garengeot hernia.

The term applies to inguinal hernia containing appendix regardless of whether there are complications such as appendicitis 5.

The appendix may remain in an inguinal hernia without symptoms. If complications develop, an atypical presentation of acute appendicitis is expected, which may mimic an incarcerated inguinal hernia.

  • blind-ending tubular structure arising from the cecum and extending into the inguinal sac

  • dilated lumen, wall enhancement and thickening, and peri-appendiceal fat stranding are suggestive of acute appendicitis

  • extension of the appendix into the inguinal sac

  • if acutely inflamed, the appendix is dilated, non-compressible, thickened and hypervascular

Claudius Amyand (c.1681-1740) was a French surgeon who performed the first successful appendectomy in 1735, on an 11-year-old boy who presented with an inflamed, perforated appendix in his inguinal hernia sac 7.

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