MCQ Anatomy 031

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A newborn boy does not pass meconium until 48 hours after his birth. Several weeks later his mother complains that he has not been passing stool regularly. Anorectal manometry reveals increased internal anal sphincter pressure on rectal distention with a balloon. The patient's disorder may be attributed to

A. defective recanalization of the colon
B. failure of neural crest cells to migrate into the colonic wall
C. herniation of abdominal contents into the umbilical cord
Complex Anorectal Disorders: Investigation and ManagementD. persistence of the proximal end of the yolk stalk
E. presence of a rectourinary fistula

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Category: Anatomy MCQs

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