TOPOGRAPHY OF THE THORAX AND -ABDOMEN 51 



crura of the diaphragm which separates it from the 

 oesophagus and aorta. 



The posterior surface of the Spigelian lobe corresponds 

 to the tenth, eleventh and upper half of the twelfth thoracic 

 vertebrae. It is covered with peritonaeum and is separated 

 by the right crus of the diaphragm from the base of the 

 right lung and oesophagus above (Plate XIII) and from 

 the vena azygos major, thoracic duct and aorta below 

 (Plates XIV and XV). 



The inferior surface of the left lobe is in contact with 

 the anterior (superior) surface of the fundus, body and a 

 small part of the pyloric portion of the stomach. The 

 tuber omentale lies upon the cardia and crura of the dia- 

 phragm above and the lesser curvature and lesser omentum 

 below (Plates XIII and XIV). This is the part of the liver 

 in contact with the oesophagus from where the oesophagus 

 passes through the diaphragm to where it enters the 

 stomach. 



That portion of the Spigelian lobe belonging to the 

 inferior surface is separated from the tuber omentale of the 

 left lobe of the liver and the anterior surface of the stomach 

 by the lesser omentum. The left or free margin of the 

 Spigelian lobe is in close relation with the lesser curvature 

 of the stomach. 



The right portion of the pars pylorica is in contact with 

 the quadrate lobe and the gall bladder. In front of the 

 lower part of the pyloric area of the quadrate lobe is a 

 slight depression, continuous with a similar area on the 

 right lobe in which the transverse colon is seen in Plates 

 XVII and XVIII. 



Anterior to the midaxillary plane the inferior surface of 

 the right lobe is in relation with the root structures of the 

 liver and the vena cava inferior in the upper part, the 



