Unusual cause of obstructive uropathy: bilateral steinstrasse

Description 

A 45-year-old man presented with decreased urinary output (<150 mL per 24 hours), anorexia, nausea and bilateral flank pain for 1 week. His serum creatinine potassium were 12.9 mg/dL and 6.0 mEq/L, respectively. He had no associated comorbidity. He had history of bilateral renal pelvic stones for which he underwent extracorporeal shock wave lithotripsy (ESWL) 2 months back, first for the right kidney (single session) then 2 weeks later for the left kidney (single session). His renal function was normal before undergoing ESWL (serum creatinine 0.9 mg/dL). No check X-ray had been done after ESWL. A plain X-ray was done that showed bilateral steinstrasse (figure 1) and on ultrasonography he had hydronephrosis in both kidneys. This caused acute renal failure due to obstructive uropathy. He was taken up for haemodialysis urgently. After two sessions of haemodialysis, he was taken up for stenting of bilateral ureters. After stenting, his renal function...

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