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Hyperoxaluria


Calcium oxalate crystals precipitate in renal tubules and are easily visible as birefringent and fan- or sheaf-shaped crystals under polarized light (polarized hematoxylin-eosin stain, × 100).

Image provided by Agnes Fogo, MD and the American Journal of Kidney Disease’s Atlas of Renal Pathology (see www.ajkd.org).