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. Author manuscript; available in PMC: 2018 Apr 2.
Published in final edited form as: Nat Rev Urol. 2016 Aug 23;13(9):549–557. doi: 10.1038/nrurol.2016.148

Figure 5. Common renal papillary abnormalities observed in stone formers.

Figure 5

Digital endoscopic images showing the papillary appearance of two different patients. a | Randall plaquesseen commonly in patients that form idiopathic calcium oxalate stones and b | ductal plugs seen commonly in patients who form idiopathic hydroxyapatite stones. In these images Randall plaques and ductal plugs are distinguishable by their colour (white versus yellow, respectively). Arrows indicate the presence of these abnormalities.