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Fig. 7C. 57-year-old woman with long history of bilateral staghorn
renal calculi after multiple percutaneous nephrolithotomy and lithotripsy
procedures. Three-millimeter thin-slab maximum-intensity-projection CT image
of left kidney shows contrast agent in dilated calices (asterisks)
and three rounded filling defects in upper pole (arrows),
corresponding to sloughed papillae in collecting system.