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Renal
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Proteinuria Diagnosis
Flowchart
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First-morning urine to confirm; orthostatic is benign.
Decision
Outcome
Decision
Asymptomatic isolated proteinuria. First step?
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First-morning urine protein/creatinine ratio
Decision
First-morning Pr/Cr?
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Elevated → workup for glomerular/parenchymal disease
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Normal → recheck UA later
Outcome
Glomerular workup: spot Pr/Cr, complement, ANA, hepatitis serologies; renal biopsy if persistent + significant
Decision
Subsequent UA?
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Positive protein → orthostatic proteinuria (benign)
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Negative → transient proteinuria
Outcome
Orthostatic proteinuria — common in adolescents; reassure
Outcome
Transient proteinuria from fever, exercise, dehydration; reassure