42 UNIVERSITY OF MISSOURI STUDIES 



odenal ligament, containing the root structures of the liver. 

 The second portion is bound to the inner part of the an- 

 terior surface of the right kidney as far down as the lower 

 margin of the hilus. For a very short space below the hilus 

 the duodenum is internal to the kidney and rests upon the 

 psoas major muscle and the ureter. Internally this second 

 portion is attached to the vena cava inferior behind and the 

 head of the pancreas in front. Anteriorly it is in relation to 

 the antrum pyloricum and the beginning of the transverse 

 colon. Externally it is in contact with the inferior surface 

 of the liver above, and is attached to the hepatic flexure below 

 (Plates XVII and XVIII). The third or transverse por- 

 tion lies upon the vena cava inferior and aorta in front of 

 the second and third vertebrae, and behind the lower part 

 of the head of the pancreas which projects downward into 

 the base of the mesentery attached to this part of the 

 duodenum. The anterior surface of this transverse portion 

 is crossed by the mesenteric vessels, and the large lymph 

 glands which accompany them. The fourth portion of the 

 duodenum is bound to the aorta, receptaculum chyli and 

 left renal vessels posteriorly, and has the radix of the 

 mesentery attached to it anteriorly. The head and neck 

 of the pancreas are attached to the internal surface while 

 the body of the pancreas passes outward above and behind 

 the duodenojejunal angle. The lateral and anterior sur- 

 faces of this portion are in relation with coils of the 

 jejunoileum. 



The duodenum in this case corresponds closely with 

 Schiefferdecker's^ second position of the duodenum. How- 

 ever in the case of his figure as in the location given by 



1 Schiefferdecker, P., Beitrage zur topographie des darmes. 

 Archiv fiir anatomie und entwickelungsgeschichte. 1886. Plate XVI, 

 %• 2. 



