Fasciae of fusion and elements of the fused enteric mesenteries in the human adult

The mesocolon: a prospective observational study

“…Surgical findings reflect those of Carl Toldt, who proposed that the mesentery of the right and left colon persist into adulthood and that they remain separated from the posterior abdominal wall by a connective tissue plane he termed the lamina mesenteria propria (later called 'Toldt's fascia of fusion' by Goligher) [18,19]. Toldt's findings were separately confirmed by Congdon and Zuckerandle, and conform more closely to surgical findings than the descriptions laid out by Treves [20]. Despite this, Toldt's fascia and the mesocolon continue to receive minor mention in reference anatomical and embryological texts, while the findings of Treves continue to provide the basis for almost all detailed appraisals of mesocolonic anatomy [11][12][13][14][15].…”

Development of a Novel Technique to Dissect the Mesentery That Preserves Mesenteric Continuity and Enables Characterization of the ex vivo Mesentery

“…A remnant of the peritoneal fusion fascia is said to persist in adult on the posterior aspect of the pancreaticoduodenal complex, and beneath the mesocolons opposed to the posterior abdominal wall. On the posterior aspect of head of the pancreas and duodenal loop it is called as Fusion fascia of Treitz (20), and elsewhere as Toldt's fascia (11,21). Thus, mesentery in the adult intestine is described as restricted in its distribution to the first part of duodenum (derived from ventral mesentery), the duodenojejunal to ileocaecal junction-"the mesentery, " and transverse and sigmoid colon (6)(7)(8).…”

Meyers' Dynamic Radiology of the Abdomen

“…They stated that the secondary or anterior retroperitoneum consists of laminated spaces, bounded by folded, fused leaves of the primitive dorsal mesentery, which results in distinct and separate colonic and pancreaticoduodenal subcompartments, separated by fusional fasciae, for which the French coined the term fascia d'accolement. 142,143 The observation that these fusion planes may reopen by the entrance of fluid or gas supports the clinical interpretation of fluid collections, seen frequently in pancreatitis, less frequently in duodenal disease, and sometimes in colon or sigmoid disease.…”