A pair of conjoined kidneys located on one side of the body represents one type of kidney structural anomaly. A second anomaly, duplex renal pelvis, involves a single kidney possessing two renal pelvises – the sections of the kidney responsible for collecting urine. A third condition, known as duplex ureter, occurs when one kidney gives rise to two ureters. These ureters might connect to the bladder, or, in women, one could potentially open into the vagina. Such deformities occur during embryonic development. To avert complications like infections, surgical intervention may be required.