Medial Presentation of the Splenic Colic Impression

Description

Arising on the visceral (medial) surface of the spleen, the splenic colic impression (impressio colica) forms a concave, anteroinferior groove where the left colic flexure abuts the organ. Superior to this area, the gastric impression occupies much of the upper medial surface, while the renal impression lies more posteroinferior, related to the left kidney. Along the superior border, the splenic notches (incisurae lienis) are positioned anterosuperiorly and help orient the observer to the anterior pole and the diaphragmatic versus visceral faces. Relationships matter. Clinically, this contact area explains why distension at the splenic flexure can aggravate left upper quadrant discomfort, and it provides an anatomic rationale for adhesions or inflammatory spread between colon and spleen in conditions such as colitis or diverticular disease near the flexure. During splenectomy, mobilization of the splenic flexure and division of the splenocolic ligament are key steps; appreciating the colic impression helps anticipate where traction can transmit force to the splenic capsule and increase the risk of capsular tear and bleeding. The medial surface is also the reference when correlating cross sectional imaging with the splenic hilum and adjacent peritoneal reflections, where confusing a colonic gas pattern for a splenic lesion is a common interpretive trap. Use this illustration for gross anatomy lab teaching on peritoneal relationships of the left upper quadrant, and for surgical education materials on left sided colectomy, splenic flexure mobilization, and splenic injury mechanisms. It also fits radiology and GI modules that pair visceral surface impressions with CT anatomy and common LUQ differentials. Anatomical accuracy verified by SciePro's Medical Advisory Board.