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- Title
Variations in Laminar Arrangements of the Mesocolon and Retropancreatic Fascia: a Histological Study Using Human Fetuses Near Term.
- Authors
Ji Hyun KIM; Shogo HAYASHI; Zhe Wu JIN; Gen MURAKAMI; RODRÍGUEZ-VÁZQUEZ, José Francisco
- Abstract
Objective: The embryonic mesentery of the ascending and descending colons as well as the pancreas disappears due to peritoneal fusion, but there might be no or few photographic demonstrations of the intermediate morphologies during the process. The aims of this study were to characterize the morphological relationship of the interface between the renal fascia and peritoneum. Methods: Fourteen late-stage fetuses with crown rump lengths (CRLs) of 250-325 mm (gestational age: 30- 38 weeks) were histologically examined. Results: The renal fascia, a thick or thin layer consisting of densely-distributed abundant fibers, was consistently separated from the renal capsule by a perirenal space containing fat. The transverse colon carried a typical mesocolon histologically different from the renal fascia. The ascending and descending mesocolons were irregularly divided into multiple laminae and the colic external longitudinal muscle appeared to directly contact the renal fascia. There was a spectrum of variations from multiple laminae to a single thick fascia between the pancreatic body and the left kidney or adrenal. Conclusions: A fascial development after retroperitoneal fusion of the mesentery showed great individual and site-dependent differences in proportion of 1) a complete fusion with the renal fascia and 2) a multilaminar structure including the remnant peritoneum. These variations masked the likely stage-dependent change.
- Subjects
FETAL development; FASCIAE (Anatomy); MESENTERY; PERITONEUM; HERNIA
- Publication
Tokai Journal of Experimental & Clinical Medicine, 2020, Vol 45, Issue 4, p214
- ISSN
0385-0005
- Publication type
Article