Kidney CT Appearances

Crossed Renal Ectopia CT Findings

• Both kidneys on the same side
• Ureteral opening on primary side of bladder
• Crossed-unfused renal ectopia:
  • Ectopic kidney does not fuse with normal kidney
  • Less common
• Crossed-fused renal ectopia:
  • Ectopic kidney fuses with the normal kidney
  • Ectopic kidney typically inferior to normal kidney
  • Associated with additional vascular anomalies
  • More common

Other Information About Crossed Renal Ectopia

Etiology:

• Congenital

Epidemiology:

• Rare
• More common in males

Presentation:

• Typically asymptomatic
• Flank pain
• Palpable mass
• Hematuria
• Dysuria

Prognosis:

• CRE is usually benign
• Symptoms are usually caused by secondary conditions which should be treated