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rectal artery

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rectal artery
n.
1. An artery with its origin in the internal pudendal artery, with distribution to the anal canal, the muscles and skin of the anal region, and the skin of the buttocks; inferior rectal artery.
2. An artery with its origin in the internal iliac artery, with distribution to the middle portion of the rectum; middle rectal artery.
3. An artery with its origin in the inferior mesenteric artery, with distribution to the upper part of the rectum; superior rectal artery.


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A tumor is classified as rectal if its inferior margin lies less than 16 cm from the anal verge or if any part of the tumor is located at least partly within the supply of the superior rectal artery.
 
 
 
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