<unk>  is a condition where there is an abnormally low level of protein in the blood. There are several causes that all result in edema once serum protein levels fall below a certain threshold.
Hypoproteinemia
Hypernatremia
Hypophosphatasia
Oxyhyperglycemia
Methaemalbuminaemia
Hyperglycerolemia
Hypercalciuria
Hyperproteinemia