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DescriptionUltrasonography of percutaneous nephrostomy tube.jpg
English: Percutaneous nephrostomy tube placed through a calyx in the lower pole of a kidney with hydronephrosis. (B) The pigtail catheter is placed in the dilated calyx. The tube in (A) and the pigtail in (B) are marked with white arrows.
For context, see en:Renal ultrasonography
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