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Question 5#

Choose the correct definition of intestinal malrotation:

A) At the 4th week of gestation the midgut herniates through the abdominal cavity, rotates 270° clockwise around the superior mesenteric artery and then travels to its resting place in the abdomen during the 10th week
B) At the 4th week of gestation the midgut herniates through the abdominal cavity, rotates 270° counterclockwise around the superior mesenteric artery and then travels to its resting place in the abdomen during the 12th week
C) At the 6th week of gestation the midgut herniates through the abdominal cavity, rotates 270° clockwise around the superior mesenteric artery and then travels to its resting place in the abdomen during the 12th week
D) At the 6th week of gestation the midgut herniates through the abdominal cavity, rotates 270° counterclockwise around the superior mesenteric artery and then travels to its resting place in the abdomen during the 10th week

Correct Answer is D

Comment:

During the 6th week of gestation, the midgut herniates out of the abdominal cavity and rotates 270° counterclockwise around the superior mesenteric artery and travels to its resting position in the 10th week of gestation. Failure of the midgut to rotate and return to the abdominal cavity during the 10th week of gestation results in intestinal malrotation.