ascending colon
US /əˌsen.dɪŋ ˈkoʊ.lən/
UK /əˌsen.dɪŋ ˈkoʊ.lən/

1.
the first part of the colon, which extends from the cecum to the right colic flexure
:
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The ascending colon is located on the right side of the abdomen.
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Inflammation of the ascending colon can cause pain in the lower right abdomen.