Question

What is Gut Rotation Defects

Answer 1

Arrested Rotation. This anomaly, which is also called nonrotation of the gut, produces left-sided colon. In this
malformation, the midgut loop does undergo the initial 90 degree rotation but fails to undergo the normal 180 de­gree counterclockwise rotation as it. re-enters the abdominal cavity. As a re­sult, the cecum and colon (ie, deriva­tives of the caudal limb of the midgut loop) return to the abdomen first and, consequently, come to lie on the left side of the abdominal cavity. The loops of small intestine, which return to the abdomen later, settle on the right side of the abdomen. This anomaly gener­ally remains asymptomatic but some­times the abnormally mobile intestinal loops may undergo a torsion or twisting called volvulus. A volvulus generally causes intestinal obstruction. Addition­ally, it may compress the intestinal blood vessels, resulting in infarction and gangrene of the affected segments of the intestine.
ii) Reverse Rotation. In this anomaly the midgut loop undergoes the initial 90 degree counterclockwise rotation nor­mally, but the second 180 degree rota­tion occurs clockwise instead of coun­terclockwise; hence, the net rotation of the midgut is 90 degree clockwise. As a result, the transverse colon passes posterior to the duodenum (instead of lying anterior to it). Also, the superior mesenteric artery courses behind the duodenum (instead of running anterior to it).