| Jonnesco's fossa | A peritoneal recess extending upward behind the superior duodenal fold. Synonym: recessus duodenalis superior, duodenojejunal fossa, duodenojejunal recess, Jonnesco's fossa, superior duodenal fossa. (05 Mar 2000) |
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| Jonnesco, Thomas | <person> Roumanian surgeon, 1860-1926. See: Jonnesco's fossa. (05 Mar 2000) |