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CSFA (Certified Surgical First Assistant) Exam

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When performing a sigmoid colectomy for cancer, the surgeon ligates the inferior mesenteric artery (IMA) at its origin from the aorta. To ensure viability of the remaining descending colon and rectal stump for anastomosis, the surgical team relies on collateral circulation primarily from which arterial structure?
Correct Answer:
Marginal artery of Drummond

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