case_images: PMC10551623_01
case_images: (A) CT examination before PCNL indicated left kidney stones and hydronephrosis of the right kidney. (B) Plain X-ray after PCNL showed the location of the left ureteral stent.
case_images: fmed-10-1239053-g0001.jpg
case_images: PMC10551623_01_fmed-10-1239053-g0001.jpg
case_images: F1
case_images: Computed tomography (CT) indicated that the patient had a left kidney stone (Figure 1A). On day 2, the patient received a plain X-ray examination, and the left ureteral stent was thought to be in a "normal" position (Figure 1B): The proximal end of the stent was in the kidney area, and the distal end was in the "bladder area." Thus, we decided that the patient might suffer from transient right renal colic as a result of vesicoureteral reflux, which was related to an overactive bladder and a dilation of the right ureter as indicated by preoperative CT.
case_images: CT examination after PCNL revealed that the distal end (red arrow) of the left ureteral stent was displaced beyond the bladder and into the right ureter. (A) Coronary section. (B) Axial section.
case_images: fmed-10-1239053-g0002.jpg
case_images: PMC10551623_01_fmed-10-1239053-g0002.jpg
case_images: F2
case_images: On day 4, the patient received a CT examination, which showed that the distal end of the left ureteral stent was displaced into the right ureter (Figures 2A, B).
case_images: (A) Coronary section of CT examination before PCNL indicated the dilation of right ureter (red arrow). (B) Axial section of CT examination before PCNL showed the dilation of bilateral ureters (red arrows). (C) CT examination showed the location of left ureteral stent after the adjustment guided by cystoscope.
case_images: fmed-10-1239053-g0003.jpg
case_images: PMC10551623_01_fmed-10-1239053-g0003.jpg
case_images: F3
case_images: The double-J stent was removed, and a new one was placed back into the left ureter, with the location of the stent being confirmed by postoperative CT (Figure 3C).