PMC4395823_01
Plane horizontal (a) and sagittal (b) CT shows that the lower part of the ureter was shifted to the outside of the cavum pelvis minor from the greater sciatic foramen.
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F1
The left lower part of the ureter was serpentine in shape and had been shifted to the outside of the cavum pelvis minor, with herniation into the greater sciatic foramen (fig. 1a, b).
Retrograde ureterography reveals a tortuous left ureter and the shadow of a constricted mass.
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F2
Constriction in the serpentine lower part of the ureter and the outside of the cavum pelvis minor was also observed; the distal ureter was straining the ureteric orifice (fig. 2).
a, b The double-J stent has returned to the normal position.
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F3
Retrograde left ureteral stenting was performed, which linearized the ureter, eliminated the mass, and reduced the constriction of the left ureteric orifice (fig. 3a, b).