Mondo Description A rare, lethal congenital malformation characterized by bilateral renal agenesis and the absence or decreased volume of amniotic fluid (oligohydramnios). The presence of oligohydramnios gives rise to congenital anomalies that include hypoplastic lungs, lower extremities abnormalities, and characteristic facial features (low-set ears, widely separated eyes, nose flattening, and receding chin). Newborn infants usually die of respiratory failure.