Ectopic Kidney

  • Etiology:
    — Pronephros – disappears by 5th week, failure of this stage leads to renal agenesis / hypoplasia
    — Mesonephros – regresses by 12th week leaving behind vas / epididymis / seminal vesicles / ejaculatory ducts, failure of this stage leads to renal agenesis / hypoplasia
    — Metanephros – ureteric bud appears, ureteric bud invaginates nephrogenic blastema, renal ascent, failure of this stage leads to renal ectopia
  • Imaging: pelvic kidney, horseshoe kidney, intrathoracic kidney, crossed fused ectopia
  • Clinical: 1/900 births

Cases of Ectopic Kidney