Internal hernia

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[edit] Discussion

  • Protrusion of the viscera through the peritoneum or mesentery and into a compartment in the abdominal cavity.
  • Most common presentation is an acute intestinal obstruction of small bowel loops that develops through normal or abnormal apertures.
  • Responsible hernial orifices are usually preexisting anatomic structures, such as foramina, recesses, and fossae.
  • Pathologic defects of the mesentery and visceral peritoneum, which are caused by congenital mechanisms, surgery, trauma, inflammation, and circulation, are also potential herniation orifices.

[edit] Types of internal hernias

  • Foramen of Winslow
  • Paraduodenal
  • Transmesenteric
  • Transomental
  • Pericecal
  • Sigmoid mesocolon
  • Supravesical
  • Pelvic hernias

[edit] Imaging Findings

[edit] CT

  • Encapsulation of distended bowel loops with an abnormal location, arrangement or crowding of small-bowel loops within the hernial sac, evidence of obstruction with segmental dilatation and stasis.
  • Mesenteric vessel abnormalities, with engorgement, crowding, twisting, and stretching of these vessels

[edit] Images

Patient #1: Presents with intermittent abdominal pain. History of gastric bypass

[edit] See Also

[edit] External Links

[edit] References