Calices renales majores extrarenales

In the material of 300 kidneys obtained from corpses of adults, extra-renal location of calices renales majores was observed in 3 of the organs. This developmental anomaly was accompanied with the variations of courses and division patterns of blood vessels within or in the vicinity of the renal hilus, whose characteristic feature was that they could cause the impairment of urinary outflow or urine retention.