MCQ Surgery Answer 14
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Intussusception is the telescoping or prolapse of one portion of the bowel into an immediately adjacent segment. Contrast enema can reduce the intussusception in approximately 75% of cases.
- Pathophysiology
- Most commonly occurs at the terminal ileum.
- The telescoping proximal portion of bowel invaginates into the adjacent distal bowel.
- The mesentery of the intussusceptum is compressed, and the ensuing swelling of the bowel wall quickly leads to obstruction.
- Venous engorgement and ischemia of the intestinal mucosa cause bleeding and an outpouring of mucous, which results in the classic description of red “currant jelly” stool.
- Most cases (90%) are idiopathic.
Intussusception is the predominate cause of intestinal obstruction in persons aged 3 months to 6 years. The estimated incidence is 1-4 per 1000 live births.Overall, the male-to-female ratio is approximately 3:1. With advancing age, gender difference becomes marked; in patients older than 4 years, the male-to-female ratio is 8:1.
The typical presentation is a previously healthy infant boy aged 6-12 months with sudden onset of colicky abdominal pain with vomiting.
Tags: MCQ, Surgery, Pediatrics, intususception
Category: Surgery MCQs
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