Case report: Crossed fused renal ectopia with stones: A surgical challenge overcome by robotic surgery

Crossed fused renal ectopia (CFRE) is an extremely rare congenital anomaly of the urinary tract that is prone to stone formation. The surgical treatment of CFRE with stones is challenging due to anatomical abnormalities.

Right kidney stones were treated by flexible ureteroscopic lithotripsy (FURSL) and left kidney stones were treated by robotic surgery.

The authors present an unreported case of bilateral renal stones in a patient with CFRE, which was successfully treated by robotic pyelolithotomy combined with FURSL. The procedure was manoeuverable, and the stone-free rate was satisfactory.

CFRE with stones (S-shaped kidney) present a surgical challenge due to anatomical abnormalities and a high stone burden. The authors recommend robotic pyelolithotomy with or without FURSL as a viable treatment option for stones with similar anatomical abnormalities.