PMC6730629_01
CT scan showing a 2.6 cm staghorn stone with 826 HU density in the right kidney (red arrow). (A) Axial view. (B) Coronal view.
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HU in the upper pole of right kidney (Fig. 1). Her serum creatinine level was 0.7 mg/dL and her urinary tract infection was diagnosed and treated before the PCNL took place, with preoperative sterile urine culture for confirmation.