This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': "A 10 month old infants present with acute intestinal obstruction. Contrast enema X-ray shows the intussusceptions. Which of the following is the most likely cause? \nSelect and explain. \nA. Payers patch hyperophy, B. Mekel's diveiculum, C. Mucosal polyp, D. Duplication cyst", 'role': 'user'}, {'content': "Answer: A \nExplanation: Most common cause of intussusception in an infant is hyperophy of Peyer's patches in the terminal ileum from an antecedent viral infection that acts as a lead point. Peristaltic action of the intestine then causes the bowel distal to the lead point to invaginate into itself. Idiopathic intussusception occurs in children between approximately 6 and 24 months of age. Beyond this age group, cause of intussusception includes polyps, malignant tumors such as lymphoma, enteric duplication cysts, and Meckel's diveiculum. Ref: Schwaz's Principles of Surgery, 9th Edition, Chapters 28, 39", 'role': 'assistant'}]