Multicystic dysplastic kidney

A rare congenital anomaly of the kidney and urinary tract (CAKUT) in which one or both kidneys (unilateral or bilateral MCDK respectively) are large, distended by multiple cysts, and non-functional. Unilateral MCDK is typically asymptomatic if the other kidney is fully functional but may occasionally present with abdominal obstructive signs when the cysts become too large. Bilateral MCDK is considered a lethal entity and neonates present with features of the Potter sequence, severe pulmonary hypoplasia and severe renal failure, and generally die shortly after birth.