case_images: PMC4531645_01
case_images: On the longitudinal parasagital section of left kidney, mild renal enlargement with minimal hydronephrosis was observed.
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case_images: By ultrasonography, the right kidney was absent and the left kidney enlarged (13.0 cm in length), with prominent corticomedullary differentiation and minimally dilated lower calices (Figure 1).
case_images: Following ultrasound examination after 5 days, a slight progression of the previously noted dilatation, and no flow signal was apparent at a duplex study.
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case_images: Doppler ultrasonography was performed to rule out diseases of the renal artery and vein, but it revealed no abnormality of the renal vessels, though it showed slight progression of the dilatation of the renal collecting system, compared with our previous study (Figure 2).
case_images: After removing the stone, the dilatation of the collecting system improved slightly, but minimal dilatation remained.
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case_images: Follow-up ultrasonography showed improved renal collecting system dilatation, though minimal dilatation persisted at a level similar to that observed in the initial study (Figure 3).