A Rare Presentation of Renal Papillary Necrosis in a COVID-19-Positive Patient

<div>Left retrograde pyelography showing multiple filling defects in almost all caliceal ends. Arrows demonstrate the lobster claw sign as the characteristic radiology feature of renal papillary necrosis.</div>

Case Reports in Urology

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Figure 1

Figure 1: A Rare Presentation of Renal Papillary Necrosis in a COVID-19-Positive Patient 