PMC8052898_01
(a) Case 1 with axial image of noncontrast computerized tomography kidneys, ureters, and bladder demonstrates a 5-mm right-sided vesicoureteric junction calculus. (b) Case 1 with axial image taken from a noncontrast limited pelvic computerized tomography where appearances are in keeping with stone passage. (c) Case 1 with a computerized tomography colonography 3 months following initial presentation with renal colic showing a 5-mm right upper ureteric stone
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F1
Noncontrast computerized tomography of his kidneys, ureters, and bladder (CTKUB) revealed a 5-mm right-sided stone situated at the vesicoureteric junction (VUJ) with associated hydronephrosis and no other renal tract calculi [Figure 1a]. This reported that the previously identified VUJ calculus had presumed to have passed [Figure 1b]. This reported a 5-mm calculus in the right upper ureter with associated hydronephrosis [Figure 1c].
PMC8052898_02
(a) Case 2 with axial image of noncontrast computerized tomography kidneys, ureters, and bladder demonstrates a 6-mm left-sided vesicoureteric junction calculus. (b) Case 2 where axial image of noncontrast computerized tomography kidneys, ureters, and bladder does not demonstrate a calculus at the left vesicoureteric junction. (c) Case 2 where the axial image of the noncontrast computerized tomography at the renal pelvis demonstrates full-length retrograde migration of the 6-mm calculus
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F2
Noncontrast CTKUB revealed a 6-mm left-sided solitary calculus situated at the VUJ with associated hydronephrosis and dilatation of the ureter proximal to the stone [Figure 2a]. This unexpected finding was subsequently confirmed with noncontrast CT imaging [Figure 2b and c].