PMC9751358_01
Renal biopsy specimen with arrow showing a couple of calcium oxalate deposits within renal tubules. (A) HE staining, 400x magnification. (B) Polarized light, 400x magnification.
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F1
Abundant tubular calcium oxalate deposits were detected within the tubular lumen (Figure 1). Additional laboratory tests revealed elevated urinary oxalate excretion (1.11 mmol/24 h).