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Histology of prebiopsy and postbiopsy. Hematoxylin and eosin, 20×, 2 μm. A, Optimally perfused preperfusion biopsy. B, Optimally perfused postperfusion biopsy. C, Nonoptimally perfused preperfusion biopsy. D, Nonoptimally perfused postperfusion biopsy. Arrows represent examples of oxalate crystals, arrow heads represent sloughed epithelial cells, and asterisk represent cytoplasmic blebbing.
