PMC4996561_01
CT scan prior to left PCNL: Bilateral staghorn stones, left 3.2 cm renal staghorn involving 3 calyces, HU of 694, and right 3.4 cm renal staghorn involving 3 calyces, HU of 664. There is mild left hydronephrosis, bilateral parenchymal thinning and two left renal parenchymal calcifications (not shown).
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Initial CT scan prior to left PCNL (Fig. 1): A left 3.2 cm renal staghorn involving three calyces with HU of 694 and a right 3.4 cm renal staghorn involving three calyces with HU of 664.
CT scan after 9 months of antibiotic therapy: No new left renal stones, improvement of left hydronephrosis and complete resolution of right renal stone.
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