<unk>  is the congenital failure of embryonic kidney formation and may either be unilateral (congenital absence of one kidney with usually normal and hypertrophied contralateral solitary kidney) or bilateral (congenital absence of both kidneys which is incompatible with life).<unk>  may be isolated or associated with other anomalies and syndromes.<unk>  is diagnosed with routine screening with fetal ultrasound. Patients with unilateral<unk>  (URA) have an increased risk for proteinuria, hypertension, and<unk>  insufficiency. The mortality rate of bilateral<unk>  (BRA) without prenatal therapy with serial amnioinfusion is 100%, however, further studies are required to assess the outcome, risks, and benefits of serial amnioinfusion.
Renal agenesis
Supernumerary kidney
Cryptorchidism
Lung agenesis
Spina bifida
Iniencephaly
Psychogenic dwarfism
Horseshoe kidney