Absent Urinary Bladder on Prenatal Ultrasound

An absent urinary bladder on prenatal ultrasound may be due to a transiently empty bladder or bilateral renal issues, including:

• Multicystic dysplastic kidney: Cysts of variable size and shape, nonmedial location of large cysts, absence of an identifiable renal sinus, lack of communication between cysts, and minimal surrounding parenchyma.
• Autosomal recessive polycystic kidney disease: Enlarged, echogenic kidneys.
• Renal agenesis: Self explanatory.