Kidney stone disease originating anywhere in the urinary system, including the kidneys and bladder. Nephrolithiasis refers to the presence of such stones in the kidneys. Calyceal calculi are aggregations in either the minor or major calyx, parts of the kidney that pass urine into the ureter (the tube connecting the kidneys to the urinary bladder). The condition is called ureterolithiasis when a calculus is located in the ureter. Stones may also form or pass into the bladder, a condition referred to as bladder stones. Stones less than in diameter pass spontaneously in up to 98% of cases, while those measuring in diameter pass
Bladder outlet obstruction process is usually reversible and isn't associated with as many poor outcomes as in infants with congenital bladder outlet obstruction. Bladder outlet obstruction is included in the spectrum of congenital anomalies of the kidney and urinary tract (CAKUT). CAKUT is the most common cause of birth defects, occurring in 1 out of 1000 live births, and accounts for approximately half of all cases of chronic kidney disease and end-stage renal disease in children. CAKUT can be classified by the degree and type of malformation as follows: Aplasia is a congenital absence of kidney tissue. Kidneys that are small for age