**1.1. Hilum**

136 Aneurysm

multiple origins.[1]

*The 2 ends* 

*The 3 borders* 

*The 2 surfaces* 

relation to the hilum of the spleen.

lobulated spleen. Notching of the superior border of the adult spleen is evidence of its

The anterior end of the spleen is expanded and more like a border; it is directed forward and downward to reach the midaxillary line. The posterior end is rounded; it is directed upward

The superior border of the spleen is notched near the anterior end, the inferior border is

There are 2 surfaces: diaphragmatic and visceral. The diaphragmatic surface is smooth and convex. The visceral surface is irregular and concave and has impressions. The gastric impression is for the fundus of the stomach; this is the largest and most concave impression on the spleen. The renal impression is for the left kidney and lies between the inferior and intermediate borders. The colic impression is for the splenic flexure of the colon; its lower part is related to the phrenicocolic ligament. The pancreatic impression for the tail of the

The spleen has 2 ends, 3 borders, and 4 surfaces, as follows:

and backward and rests on the upper pole of the left kidney.

rounded, and the intermediate border is directed toward the right.

pancreas lies between the hilum and colic impression (see the image below).

**Figure 2.** Spleen showing the different surfaces and impressions caused by different organs with

The hilum lies on the inferomedial part of the gastric impression. It transmits the splenic vessels and nerves and provides attachment to the gastrosplenic and splenorenal (lienorenal) ligaments.
