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Why are serum tests preferable to urine tests?

April 26, 2017preferable serum tests urine

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Why are serum tests preferable to urine tests?

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Since the kidney can metabolise between 10 and 30g of FLCs per day in the proximal tubules, urinary FLC results do not accurately reflect FLC production by the tumour. This results in a poor correlation between serum and uFLC concentrations and makes urine testing unreliable.