Intussusception

(in-tus-sus-ep' -shun). Invagination or involution of one part of the intestine within another part. It is of frequent occurrence in the young. It is caused by undue peristalsis. The site of the intu usception varies; thus, it may be I. Ileo-cecal, the ileum with the ileo-cecal valve descending into the cecum and colon; this is the most common variety; 2. the invagination being limited to the large intestine! 3. Ileal, when the ileum alone is involved; 4- colic, when the ileum prolapses through the lips of the ileo-cecal valve.