What's the difference between i.e. and e.g.?
intussusception in·tus·sus·cep·tion (ĭn'tə-sə-sěp'shən)
Invagination, especially an infolding of one part of the intestine into another.
Assimilation of new substances into the existing components of living tissue. Also called introsusception.
telescoping of a segment of the intestine into an adjacent segment, producing a mechanical obstruction of the alimentary canal. Primary intussusception is sometimes congenital and rarely appears later than the third year of life; it arises in the course of intestinal development, but the mechanism producing it is unknown.