A patient with chronic dehydration and gout develops kidney stones. Which mechanism explains why uric acid precipitation leads to calcium oxalate stones rather than isolated uric acid stones?

💡 Explanation

Uric acid crystals cause localized renal tubule injury, because this epithelial damage then provides nucleation sites for calcium oxalate crystallization; therefore, calcium oxalate stones form rather than pure uric acid stones, which would require specific uric acid saturation conditions and lack this seeding effect.

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