Crossed fused kidneys with malrotated left kidney and extra renal pelvis on left.
Crossed renal ectopia
- kidney located on opposite side of midline from its ureteral orifice; usually L> R and crossed kidney inferior to normal kidney
Cause:? Faulty development of ureteral bud, vascular obstruction of renal ascent
Associated with: obstruction urolithiasis, infection, reflux, megaureter, hypospadias, cryptorchidism, urethral valves, multicystic dysplasia
a) fused (common)
b) separate ( rare)
- Invariably aberrant renal arteries
- Distal ureter inserts into trigone on the side of origin.