[Hyponatremia and elevated hematocrit in nephrotic syndrome].

We report the cases of 2 children in whom, during active nephrotic syndrome, simultaneous dilutional hyponatremia and increased hematocrit were observed. Fluid and electrolyte disorders rapidly became normal after albumin infusion, sodium and water restriction and diuretic administration. Increased hematocrit level, which reflects the decreased intravascular compartment, is observed rarely in the course of nephrotic syndrome and should not lead to administering water and salt. The mechanisms which control the salt-water balance in the course of the nephrotic syndrome remain unclear.