Congenital hydronephrosis
Congenital obstruction of urinary tract
Duplex kidneys, or double kidneys, occur in approximately 1% of the population. This occurrence normally causes no complications, but can occasionally cause urine infections.[16][17]
Duplicated ureter occurs in approximately one in 100 live births
Horseshoe kidney occurs in approximately one in 400 live births
Nutcracker Syndrome
Polycystic kidney disease
Autosomal dominant polycystic kidney disease afflicts patients later in life. Approximately one in 1000 people will develop this condition
Autosomal recessive polycystic kidney disease is far less common, but more severe, than the dominant condition. It is apparent in utero or at birth.
Renal agenesis. Failure of one kidney to form occurs in approximately one in 750 live births. Failure of both kidneys to form used to be fatal; however, medical advances such as amnioinfusion therapy during pregnancy and peritoneal dialysis have made it possible to stay alive until a transplant can occur.
Renal dysplasia
Unilateral small kidney
Multicystic dysplastic kidney occurs in approximately one in every 2400 live births
Ureteropelvic Junction Obstruction or UPJO; although most cases appear congenital, some appear to be an acquired condition