Definition: a sickle-shaped fold of peritoneum, sometimes found arching between the left side of the duodenojejunal flexure and the medial border of the left kidney; its right free edge contains the ascending branch of the left colic artery and inferior mesenteric vein; forms anterior boundary of the paraduodenal recess.
Synonym(s): plica paraduodenalisTA, Treitz arch
See Also: paraduodenal recess
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Examples: glitazone, GI cocktail, etc.