Renal Pelviceal Keratinizing Squamous Metaplasia with Sparing of Pyramidal Zones

<table>Macroscopic findings showing squamous metaplasia of renal pelvis and abrupt sparing of pyramidal zones. Insert lower left shows metaplastic process stops at transition zone.</table>

Case Reports in Urology

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Figure 1

Figure 1: Renal Pelviceal Keratinizing Squamous Metaplasia with Sparing of Pyramidal Zones 