text: Postnatal<unk>  scintigraphy in patients with unilateral<unk>  agenesis (URA) shows no<unk>  function and may be helpful in differentiating unilateral<unk>  agenesis (URA) from multicystic dysplastic kidney (MCDK) or<unk>  ectopia.
option_0: Renal agenesis other imaging findings
option_1: Horseshoe kidney causes
option_2: Renal agenesis pathophysiology
option_3: Renal agenesis echocardiography or ultrasound
option_4: Horseshoe kidney other diagnostic studies
option_5: Down syndrome other imaging findings
option_6: Renal agenesis causes
option_7: Horseshoe kidney other imaging findings