Why does calcium oxalate crystal formation accelerate within kidney tubules exhibiting distal tubular acidosis (Type 1 RTA)?

💡 Explanation

In Type 1 RTA, impaired distal tubule acidification reduces urinary citrate excretion, a key inhibitor of calcium oxalate crystallization. Because citrate normally binds calcium, its absence promotes crystal formation; therefore, decreased urinary pH precipitates calcium oxalate crystals rather than preventing them.

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