Agenesis of Kidney

  • Etiology: failure of induction of the nephrogenic blastema by ureteric bud -> absent kidney -> oligohydramnios -> Pulmonary hypoplasia + Potter sequence
  • Imaging: prominent adrenal, microbladder due to not being used
  • Clinical: can be unilateral or bilateral

Radiology Cases of Agenesis of Kidney

IVP of renal agenesis
AP image from the nephrogram phase of a vintage intravenous pyelogram shows a dense nephrogram in the right renal fossa representing the right kidney with contrast draining down the right ureter and filling the bladder. There is no nephrogram noted in the left renal fossa.

Radiology Cases of Zinner syndrome (kidney agenesis and ipsilateral seminal vesicle cyst)

US of kidney agenesis and seminal vesicle cyst / Zinner syndrome
Sagittal US of the left renal fossa (above) demonstrated that no left kidney was present in the left renal fossa or pelvis. Transverse ultrasound of the bladder (below) demonstrated a cystic structure adjacent to the left side of the bladder.