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  1. #1
    Asclepius1's Avatar
    Asclepius1 is offline Ultimate Member 537 points
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    additional source of blood to the descending colon

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    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

  2. #2
    quachtinh is offline Junior Member
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    The answer is middle colic artery



    Middle colic artery
    *superior to rt. colic
    *supplies rt. 1/2 of transverse colon
    *anast. w/ neighboring arteries page 287 of Netter

    Inferior Mesenteric Artery
    *Unpaired vessel that arises 3 cm, superior to aortic bifurcation
    * Supplies the left 1/2 of transverse colon, descending colon, sigmoid colon, greater part of rectum.

  3. #3
    Asclepius1's Avatar
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    I agree. Middle colic

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