caa a22 4500 463199669 CHVBK 20180405153108.0 cr unu---uuuuu 170326e20071201xx s 000 0 eng 10.1007/s00276-007-0268-3 doi (NATIONALLICENCE)springer-10.1007/s00276-007-0268-3 Duodeno-jejunal junction: a histoanatomical study with the concept of the existence of an "anatomical” sphincter [Elektronische Daten] [Ahmed Shafik, Ali Shafik, Mohamed Wahdan, Olfat Sibai] Background: Duodenojejunal junction (DJJ) pressure decreased on duodenal contraction and increased on jejunal contraction. These findings postulated potential existence of anatomical sphincter at DJJ. Methods: DJJ was studied by direct dissection in 34 cadavers and histologically in 24. Transverse and longitudinal sections across DJJ were cut and stained. Results: DJJ was narrower than duodenum or jejunum and had one or two grooves occupied by arterial branch derived from superior mesenteric artery and we call it "duodenojejunal junction artery”. DJJ was thicker on palpation than duodenum or jejunum. Its mucous membrane was crowded into "DJJ rosette”. DJJ length varied in adults from 0.75 to 0.9cm. Microscopically, circular muscle layer was thickened at DJJ. Conclusion: The thickened circular muscle, mucosal rosette and narrowing at DJJ point to possible existence of anatomical sphincter at DJJ. Together with presence of high-pressure zone at DJJ, these findings would support such postulation. Springer-Verlag, 2007 Duodenum nationallicence Jejunum nationallicence Reflex nationallicence Duodenojejunal artery nationallicence Anatomy nationallicence Shafik Ahmed Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt aut Shafik Ali Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt aut Wahdan Mohamed Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt aut Sibai Olfat Department of Surgery, Faculty of Medicine, Menoufia University, Shebin El-Kom, Egypt aut Surgical and Radiologic Anatomy Springer-Verlag 29/8(2007-12-01), 661-665 0930-1038 29:8<661 2007 29 276 https://doi.org/10.1007/s00276-007-0268-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00276-007-0268-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Shafik Ahmed Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt aut NATIONALLICENCE 700 1- Shafik Ali Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt aut NATIONALLICENCE 700 1- Wahdan Mohamed Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt aut NATIONALLICENCE 700 1- Sibai Olfat Department of Surgery, Faculty of Medicine, Menoufia University, Shebin El-Kom, Egypt aut NATIONALLICENCE 773 0- Surgical and Radiologic Anatomy Springer-Verlag 29/8(2007-12-01), 661-665 0930-1038 29:8<661 2007 29 276 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer