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Kidney Stones

Update in Diagnosis and Management

Hyperoxaluria: What is the Relevant Concentration?

Slide 16

February 2010

The level of urinary oxalate can vary greatly depending on the underlying disease. In idiopathic calcium oxalate stone formers urinary oxalate is typically only modestly above the reference range of 40 mg/day. Higher levels, up to twice normal, are more typical of patients with malabasorptive disorders and enteric hyperoxaluria. Levels more than 100 mg/day are more typical of rare causes of hyperoxaluria, and should therefore prompt evaluation for primary hyperoxaluria.

Relevant Concentration?


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