Summary
In a series of electron microscopic studies of human urinary stones, a stone composed of sodium orthophosphate hydrate was identified. The stone was recovered from a patient who succumbed to advanced renal failure. A massive failure of the sodium pump, which cotransports phosphate across the brush border membrane of the proximal tubules is thought to be responsible for such an exceptional stone. This appears to be the first description of sodium phosphate crystal in a human urinary stone. Electron microscopy is a useful tool for stone analysis.
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Kim, K.M., Alpaugh, H.B. & Johnson, F.B. Sodium orthophosphate hydrate (NA3PO4·12H2O): A new type of human urinary stone. Urol. Res. 13, 301–304 (1985). https://doi.org/10.1007/BF00262661
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DOI: https://doi.org/10.1007/BF00262661