PMC9557805_01
plain radiography X-ray before stent removal: no knotting in the stent (arrow)
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F1
A plain radiograph X-ray of the abdomen showed no abnormalities in the stent (Figure 1).
appearance of the knotted double-j stent on the fluoroscopic image (square)
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F2
Under general anesthesia and fluoroscopic guidance, a fluoroscopic image revealed a knotted stent lodged at the ureteropelvic junction (Figure 2).
endoscopic view of the proximal end of the stent knotted and encrusted in the pelvic ureter (arrow)
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F3
Then, a 6-French ureteroscope was advanced into the ureter, and a knot was seen in the proximal end of the DJ stent (Figure 3).
ureteral DJ stent after removal with knotted part (arrow)
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F4
Then, the ureteric DJ stent was entirely removed by grasping forceps (Figure 4).