RT Journal Article T1 Morphology of the ligament of Treitz likely depends on its fetal topographical relationship with the left adrenal gland and liver caudate lobe as well as the developing lymphatic tissues: a histological study using human fetuses A1 Yang, Jae Do A1 Ishikawa, Kazuo A1 Hwang, Hong Pil A1 Yu, Hee Chul A1 Rodríguez Vázquez, José Francisco A1 Murakami, Gen A1 Cho, Baik Hwan AB To investigate the factors affecting the development of the ligament of Treitz, we examined sagittal and frontal histological sections of 35 human fetuses with a crown-rump length of 100–300 mm (approximately 16–38 weeks of gestation). The retropancreatic fascia consistently extended in a layer behind the pancreatic body and the splenic artery and vein, and also in front of the left renal vein and left adrenal. In 18 specimens, a connective tissue band was seen originating from the diaphragmatic crus around the esophageal opening and ending at the retropancreatic fascia to the left of the origin of the celiac artery. In 10 of these 18 specimens, these putative upper parts of the ligament contained striated muscles, or so-called Hilfsmuskel. Although most of other 17 specimens were larger fetuses, the left adrenal, the liver caudate lobe and the celiac ganglion made space for the ligament very limited. In 22 specimens including the above 18, the retropancreatic fascia extended inferiorly to approach the fourth portion of the duodenum (D4) or the duodenojejunal junction (DJJ). However, in 11 of the 22 examples of the putative lower part of the ligament, the connection between the duodenal muscle coat and the fascia was interrupted by developing lymphatic tissues. Consequently, the ligament of Treitz seemed to develop from both pleuroperitoneal membrane-derived cells and the retropancreatic fusion fascia, although the morphology was markedly modified by adjacent structures such as the adrenal gland. The ligament may “recover” after the adrenal becomes reduced in size after birth. PB Springer SN 0930-1038 YR 2012 FD 2012-07-10 LK https://hdl.handle.net/20.500.14352/110946 UL https://hdl.handle.net/20.500.14352/110946 LA eng NO Yang, J.D., Ishikawa, K., Hwang, H.P. et al. Morphology of the ligament of Treitz likely depends on its fetal topographical relationship with the left adrenal gland and liver caudate lobe as well as the developing lymphatic tissues: a histological study using human fetuses. Surg Radiol Anat 35, 25–38 (2013). https://doi.org/10.1007/s00276-012-0996-x NO Marumo Research Foundation for Emergency Medicine (Japón) DS Docta Complutense RD 7 abr 2025