Assess kidney stone composition risk factors to guide metabolic workup and prevention. Calcium oxalate (75-80% of stones) is associated with hypercalciuria, hyperoxaluria, hypocitraturia. Uric acid (5-10%) with low urine pH and gout. Struvite (5-15%) with urease-producing organisms. Cystine (under 1%) with cystinuria.
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