sigmoid mesocolon hernia

Intersigmoid hernias, also known as sigmoid mesocolon hernias, (alternative plural: herniae) occur when small bowel loops protrude into a peritoneal pocket (intersigmoid fossa) formed between two adjacent sigmoid segments and their mesentery.


Sigmoid mesocolon hernias account for ~5% of all internal hernias .


Some authors divide sigmoid mesocolon hernias into three categories :

  • intersigmoid hernia
  • transmesosigmoid hernia
  • intermesosigmoid hernia

It is difficult, maybe impossible, to distinguish these subtypes preoperatively with no clear radiographic sign identified to distinguish among the three subtypes . Thus, most radiologists and surgeons just refer to intersigmoid hernias, rather than trying to differentiate between them.

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