| intersigmoid hernia | A hernia into the intersigmoid fossa on the under surface of the root of the mesosigmoid near the inner border of the psoas magnus muscle. (05 Mar 2000) |
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| interstitial hernia | A hernia in which the protrusion is between any two of the layers of the abdominal wall. (05 Mar 2000) |
| intraepiploic hernia | A coil of intestine incarcerated in an omental sac. (05 Mar 2000) |
| intrailiac hernia | An interstitial hernia projecting from the internal inguinal ring. (05 Mar 2000) |
| intrapelvic hernia | An interstitial hernia projecting into the pelvis from the internal inguinal ring. (05 Mar 2000) |
| irreducible hernia | A hernia that cannot be reduced without operation. Synonym: incarcerated hernia. (05 Mar 2000) |
| ischiatic hernia | <surgery> A hernia through the sacrosciatic foramen. (05 Mar 2000) |
| obturator hernia | Hernia through the obturator foramen. (05 Mar 2000) |
| orbital hernia | Displacement of orbital fat through a defect in the orbital septum or Tenon's capsule into the subcutaneous tissues of the eyelid or subconjunctivally. (05 Mar 2000) |
| Treitz's hernia | A hernia in the subperitoneal tissues. Synonym: retroperitoneal hernia, Treitz's hernia. (05 Mar 2000) |
| epigastric hernia | Hernia through the linea alba above the navel. (05 Mar 2000) |
| extrasaccular hernia | A hernia in which an abdominal viscus forms part of the sac. Synonym: extrasaccular hernia, parasaccular hernia, slipped hernia. (05 Mar 2000) |
| umbilical hernia | <surgery> An abnormal protrusion of internal abdominal contents into a defect in the umbilical area. Common in the newborn, but usually resolves by age two. (27 Sep 1997) |
| fascial hernia | A bulging of muscle through a defect in its fascia. (05 Mar 2000) |
| fat hernia | A hernia in which the tissue protruding out of its normal location is composed only of fat. (05 Mar 2000) |