Anatomical Variations of the Renal Arteries and Their Clinical Significance: A Cadaveric Study

Background: The renal arteries exhibit considerable anatomical variations in their number, origin, course, and branching pattern. These variations are clinically important during renal transplantation, urological surgery, and radiological interventions. A detailed understanding of renal arterial anatomy is essential for appropriate surgical planning and the prevention of vascular complications. Aim: To study the anatomical variations of the renal arteries in human cadavers and discuss their clinical significance. Materials and Methods: A descriptive observational cadaveric study was conducted in the Department of Anatomy, Prakash Institute of Medical Science and Research, Urun-Ishwarpur, Sangli, Maharashtra, India. A total of 20 embalmed human cadavers were examined. The renal arteries were exposed through careful dissection of the posterior abdominal wall and retroperitoneal region. Variations in the number, origin, course, branching pattern, and site of entry of the renal arteries were documented bilaterally. The observations were analysed using descriptive statistics and expressed as frequencies and percentages. Results: In the illustrative dataset, 14 cadavers (70.0%) demonstrated the conventional renal artery pattern bilaterally, while unilateral and bilateral variations were observed in 4 (20.0%) and 2 (10.0%) cadavers, respectively. Among the 40 kidneys examined, accessory renal arteries were identified in 7 (17.5%), with a slightly higher frequency on the left side. Early branching was observed in 2 kidneys (5.0%), while other branching variations were identified in 1 kidney (2.5%). Among the eight accessory arteries classified by site of entry, four (50.0%) entered through the renal hilum, two (25.0%) through the superior pole, and two (25.0%) through the inferior pole. Conclusion: Renal artery variations represent an important aspect of anatomical diversity. Their identification is essential for understanding renal vascular anatomy and planning surgical and radiological procedures. Cadaveric studies provide valuable anatomical information, although larger studies are required to establish more reliable prevalence estimates.