During anatomic study of the abdominal cavity, additional renal branches from the aortic axis were revealed in a 97-year-old male Caucasian cadaveric donor. Continued dissection outlined notable anatomic variations in the arterial, venous, and ureteric patterns. No urologic or cardiovascular issues were reported by the donor or family at the time of enrolment in the Deeded Body Program. For this type of study, Institutional Review Board approval is not required for research conducted with cadaveric specimens.\nBoth kidneys were retroperitoneal and similar in size with measurements of 12.3 cm (l) and 12.7 cm (r) in the craniocaudal direction. Despite the fact that the lengths were similar, there were marked differences in the relative positioning of the superior and inferior poles. The superior pole of the right kidney was situated more superiorly. The inferior pole of the left kidney was positioned near the superior border of the left common iliac artery. Although each kidney occupied an extended volume, neither kidney had a pelvic component. Hilar structures entered/exited the organs anteriorly, not with the typical medially projected hilum ().\nA total of five major arteries (3l and 2r) emerged from the aortic and common iliac axes (Figures and ). The superior left renal artery originated from the abdominal aorta and supplied the superior pole. This artery (5.2 mm diameter) branched into two vessels of similar caliber to supply the upper third of the organ. Supply to the left gonad originated from the more inferior of these two branches (Figures and ). The middle left renal artery (6.1 mm diameter) originated from the iliac junction, just anterior to the median sacral artery (Figures and ). The inferior left renal artery (5.4 mm diameter) originated from the common iliac artery, and coursed posteriorly to the kidney before entering the hilum anteriorly (from the lateral aspect of the organ), to supply the inferior pole (Figures , , and ). On the contralateral side, the vasculature to the right kidney consisted of only two renal arteries, both originating from the abdominal aorta. The superior renal artery (6.2 mm diameter) branched laterally from the aorta (at the same level as the left superior renal) and supplied the superior pole. As with the contralateral side, this artery also branched into two vessels of similar caliber, but supplied the superior half of the organ (Figures and ). In contrast to the contralateral side, the right gonadal artery branched directly from the aorta at its generally observed position, just inferior to the (superior) renal artery. Arterial supply to the inferior pole (6.5 mm diameter) originated on the lateral aorta, at a level inferior to the inferior mesenteric artery, and branched into two arteries (Figures , , and ).\nMultiple contributing veins, of different caliber, coalesced into four major renal veins (2l and 2r) that returned blood from the kidneys to the IVC (). The relative positioning of the superior renal veins followed the conventional pattern, entering the IVC through single vessels at a level just inferior to the superior mesenteric artery as it emerged from the aorta. On the right side, three major veins merged into a short segment (3 mm in length) to drain the superior 2/3 of the organ. The inferior 1/3 of the organ was drained through two primary contributors that merged into a single vein that ultimately drained into the IVC at the level of the previously described right inferior renal artery. A visible and substantive anastomotic connection was evident between the superior and inferior venous pathways (). On the left side, the superior renal vein received contributions from the suprarenal gland and the superior half of the kidney. Venous return from the left gonad ultimately merged into the most inferior branch of the three primary contributors to the superior renal vein (Figures and ). The inferior renal vein drained directly into the anterior aspect of the IVC at the junction of the common iliac veins, posterior to the bifurcation of the aorta. The most inferior of the three primary contributors to the inferior renal vein emerged from the posterior lateral aspect of kidney and spanned the hilum to ultimately converge into the inferior renal vein. The middle contributor emerged from the parenchyma, but was unremarkable. As on the contralateral side, a visible and substantive venous anastomotic connection was evident between the superior and inferior aspects of the kidney ().\nUnilateral duplication of the kidney with concomitant ureters was evident for the right side (). Aligned with the arterial pattern of this organ, the superior ureter demonstrated a discreet collecting system with well-formed minor and major calyces draining into a defined renal pelvis. The majority of the superior renal pelvis was positioned posterior to the vasculature (Figures and ). At the inferior portion of the kidney, the hilum was more anteriorly directed with the calyces and renal pelvis more evident given their anterior position relative to the vasculature. Both ureters continued inferiorly and independently to enter the bladder (). Histological investigation of the ureterovesical junctions was not completed; however a distinct orifice near the bladder trigone was evident for each ureter. On the contralateral side, the single ureter emerged from a widened and anteriorly projected hilum (). Major calyces from the peripheral parenchyma were evident and these calyces contributed to an elongated renal pelvis. The remaining course of the left ureter was unremarkable.
A 51-year-old female had palpitations and radiating back pain and underwent whole-aorta angio 3D computed tomography (CT). The CT revealed a horizontal axis right kidney with a 4.2 cm, lobulating contour multilocular cystic mass at the lower pole. There were multiple irregular, enhancing septations with an enhancing solid portion and central calcification in the mass. The renal artery was located ventrally and the renal vein was located dorsally. The renal pelvis was located caudal to the renal vessels (). She was diagnosed as having cystic RCC in the horizontal axis right kidney and underwent hand-assisted laparoscopic radical nephrectomy in September 2010.\nUnder general anesthesia, the patient was positioned in the left lateral decubitus position. A 7 cm laparoscopic hand-assist device was placed in the right lower quadrant with the placement of two additional 10 mm ports directly cephalad along the lateral rectus border, allowing 8 cm of separation between the ports and the hand-assist device. Following dissection into the retroperitoneal space, the kidney was separated from the psoas muscle, adjacent bowel, and liver. There was a 4 cm cystic mass in the horizontal axis right kidney (). The ureter was carefully isolated and divided. The renal artery and renal vein were adhered together, so we used an Endo-GIA universal stapler (Covidien Surgical, Dublin, Ireland) and divided them, thereby isolating the entire right kidney. The specimen was entrapped in a laparoscopic sac and extracted. The procedure was completed successfully with a surgical time of 1 hour and an estimated blood loss of 100 ml. Patient-controlled analgesia with morphine was discontinued on postoperative day one. Postoperatively, the patient did not develop any complications. Pathology revealed the tumor to be a clear cell carcinoma (Fuhrman grade 3) with the tumor limited to the kidney (T1a) and with negative resection margins. In December 2010, follow-on CT revealed no recurrence of the disease.