Invagination of one segment of bowel within another is called:
a. atresia.
b. stenosis.
c. herniation.
d. intussusception.
ANS: D
Intussusception occurs when a proximal section of the bowel telescopes into a more distal segment, pulling the mesentery with it. The mesentery is compressed and angled, resulting in lymphatic and venous obstruction. Invagination of one segment of bowel within another is the definition of intussusception, not atresia, stenosis, or herniation.
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