clar697
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An 8-year-old boy is brought to the emergency department by his mother because he has had intermittent abdominal pain for the past 24 hours. Within the past 2 hours the pain has become more severe and constant, and he has developed a temperature of 38 degrees C (100.4 degrees F). Physical examination shows tenderness and guarding in the right lower quadrant. A diagnosis of acute appendicitis is made and a laparotomy is performed. The appendix is found to be normal; however, an inflamed ileal diverticulum is removed. Which of the following developmental defects is most likely responsible for this finding?
A) Abnormal fixation of the intestinal mesentery
B) A defect in the longitudinal layer of the intestinal muscularis
C) Failure of the normal recanalization leading to duplication of the intestinal lumen
D) Failure of the midgut loop to rotate as it enters the abdomen
E) Persistence of a remnant of the proximal portion of the yolk sac
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| Aashi
Forum Moderator
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E) Persistence of a remnant of the proximal portion of the yolk sac -------->It is a vestigial remnant of the omphalomesentric duct- the vitelline duct----------->Meckel's diverticulum
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| gladiator9
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