[Urinary erythropoietin excretion: an unknown cause of anemia during nephrotic syndrome]

INTRODUCTION: Nephrotic syndrome (NS) is characterized by an excessive urinary protein excretion. CASE RECORD: A woman, followed-up for NS, present progressive anemia, with no simple explanation. Plasma EPO is low with significant urinary EPO excretion. Treatment with EPO corrects hemoglobin level. CONCLUSION: EPO deficiency due to excessive urinary excretion is an underestimated cause of anemia during NS