Intussusception is the telescoping of a proximal segment of the bowel into the lumen of an adjoining distal segment.

Needless to say, there is a grave risk of cutting off the blood supply to the gut and developing gangrene. It is common in children. Ileocolic, colocolic, and ileoileal forms do occur, but ileocolic is the most common. The high incidence in children may be caused by the relatively large size of the large bowel compared with the small intestine at this time of life. Another factor may be the possible swelling of Peyer’s patches secondary to infection. In the latter case, the swollen patch protrudes into the lumen and violent peristalsis of the ileal wall tries to pass it distally along the gut lumen.

Webster Dictionary Meaning

1. Intussusception
- The reception of one part within another.
- The abnormal reception or slipping of a part of a tube, by inversion and descent, within a contiguous part of it; specifically, the reception or slipping of the upper part of the small intestine into the lower; introsusception; invagination.
- The interposition of new particles of formative material among those already existing, as in a cell wall, or in a starch grain.
- The act of taking foreign matter, as food, into a living body; the process of nutrition, by which dead matter is absorbed by the living organism, and ultimately converted into the organized substance of its various tissues and organs.
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