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Trilobar pelvic kidney with renal vascular variations in a fetus

Authors:Thyagaraju K, Subhadra Devi V , Yamini Devi C
Int J Biol Med Res. 2012; 3(2): 1854 – 1856  |  PDF File


An ectopic kidney is one that is located outside the renal fossa. It results from failure in upward migration of ureteric bud and metanephric blastema from pelvis to the lumbar region. Failure in the ascent can result in vascular variations and positional variations. Left sided renal ectopia with associated genital anomaly was observed during dissection of a 29 weeks female fetus. The left kidney was tri-lobular and presented positional and vascular variations. Vascular variations on left side include two renal arteries and two renal veins with variation in their origin, course, length and branching pattern. Right kidney though normal in location and vascularization presented hydro ureter. The genital anomaly in the form of unicornuate uterus was present. Positional variation on left side indicates developmental arrest in the ascent of kidney at pelvic brim in front of termination of aorta with hilum facing anterior due to failure of rotation. The positional and vascular variations of kidney are important not only for anatomists but also for surgeons.