Superior Segment of the Kidney, Anterior View

Description

Oriented in anatomical position, the anterior surface of a single kidney is presented with emphasis on the superior segment (segmentum superius), the cranial vascular territory within the renal parenchyma. The superior pole lies superior to the renal hilum, while the medial border curves toward the renal pelvis and proximal ureter, and the lateral border forms the convex renal margin. Segmental boundaries correspond to the intrarenal distribution of the anterior division of the renal artery, with the superior segment typically receiving a dedicated segmental branch that courses centrally before arborizing toward the upper cortex. No overlap. Minimal collateral flow. Segmental anatomy matters because renal arterial branches behave as end arteries, so occlusion or surgical ligation of a superior segmental artery can produce a sharply demarcated upper pole infarct visible on contrast-enhanced CT. This is the territory encountered during upper pole partial nephrectomy for a small renal cell carcinoma, and it also frames planning for selective arterial clamping or superselective embolization in iatrogenic hemorrhage after percutaneous nephrolithotomy. An anterior view clarifies how the superior segment relates to the hilum and anterior collecting system, a practical orientation for hilar dissection and for anticipating ischemic margins during nephron-sparing surgery. Use this artwork in gross anatomy and renal module teaching to reinforce the concept of segmental, nonanastomosing renal blood supply alongside collecting system anatomy. It also fits urologic oncology atlases, interventional radiology case discussions on segmental embolization, and surgical consent graphics that explain upper pole ischemia risk after selective clamping. Anatomical accuracy verified by SciePro's Medical Advisory Board.