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Prep4USMLE Forum » USMLE Step 1 Forum » Anatomy & Neuranatomy

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4 Posts

yaku
Forum Newbie

Topics: 3
Posts: 13

03/27/05 - 09:17 AM

A 70-year-old man has a 90% blockage at the origin of
the inferior mesenteric artery. He does not have
intestinal angina. Which of the following arteries is the
most likely additional source of blood to the
descending colon?
(A) Left gastroepiploic
(B) Middle colic
(C) Sigmoid
(D) Splenic
(E) Superior rectal

mjl1717
Forum Hero
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Topics: 956
Posts: 5,452

03/27/05 - 10:13 AM

sigmoid

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lucky1
Forum Newbie

Topics: 0
Posts: 13

04/26/05 - 09:36 AM

i will go with middle colic as the inf. mesentric is blocked.

sigmoid is branch of inf. messentric

monterusca2004
Forum Junior

Topics: 7
Posts: 42

04/26/05 - 08:53 PM

I agree, middle colic is from superior mesenteric arterie, could be given collateral trough marginal artery to the territory of inferior mesenteric artery, which would be unlikely if the contrary case, that is, if the superior mesenteric artery would be blocked

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