PMC8483010_01
Shows left kidney with ventrally located hilum and the tubular ureter emerging through the cratered hilum. The two tributaries of the renal vein were medial to the ureter and anterior to the main renal artery. The main renal artery took origin from the tortuous aorta at the same level as the origin of the superior mesenteric artery. An additional accessory renal artery took origin from the abdominal aorta inferior to the inferior mesenteric artery. A well-defined renal pelvis was absent and the tubular ureter was formed of four tubular units, marked a, b, c, and d; (AcRA) Accessory Renal Artery; (MRA) Main Renal Artery; (RV) Renal Vein; (SMA) Superior Mesenteric Artery; (IMA) Inferior Mesenteric Artery; (PM) Psoas Major Muscle; (QL) Quadratus Lumborum; (U) Ureter; (D) Diaphragm.
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There was no well-defined renal pelvis; instead the tubular ureter had four divisions entering into the renal parenchyma at the hilum of the kidney (labeled a, b, c, and d in Figure 1). The MRA was thin and originated from the abdominal aorta at a level just inferior to the origin of the superior mesenteric artery, entering the kidney through its medial border after giving off 3 branches (represented by red asterisks in Figures 1 and 2) to the left suprarenal gland.
The left renal vein traversing anterior to the main renal artery has been reflected to expose the main renal artery and its branches to the left suprarenal gland (shown with red asterisks). Note that after providing branches to the suprarenal gland, the AcRA pierced the upper half of the medial border of the kidney. The AcRA was thicker in comparison to the MRA. (AA) Abdominal aorta; (AcRA) Accessory Renal Artery; (MRA) Main Renal Artery; (RV) Renal Vein; (SMA) Superior Mesenteric Artery; (IMA) Inferior Mesenteric Artery; (PM) Psoas Major Muscle; (QL) Quadratus Lumborum; (U) Ureter; (D) Diaphragm.
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The MRA was thin and originated from the abdominal aorta at a level just inferior to the origin of the superior mesenteric artery, entering the kidney through its medial border after giving off 3 branches (represented by red asterisks in Figures 1 and 2) to the left suprarenal gland. The AcRA divided into two segmental arteries before piercing the lower part of the medial border of the kidney (Figure 2). 