Bilateral extrarenal calyces, renal pelvis and associated variations of renal vessels – A rare variation of the renal collecting system

The presence of extrarenal calyces is a rare anomaly, which may develop due to a disparity resulting from slow development of the metanephric tissue or to a relatively rapid development of the ureteric bud. Bilateral extrarenal calyces, which are characterized by calyces and renal pelvis that lie outside the renal parenchyma, associated with variations of renal vessels is one of the rare anomalies of the collecting system. Patients with such variations may be asymptomatic in some cases; in others, they can develop hydronephrosis. During routine dissection we found a rare case of bilateral extrarenal calyces and renal pelvis with multiple variations in the renal vessels.